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Rework SD interface and add head 4

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This commit is contained in:
Matt Jenkins
2025-09-05 19:36:48 +01:00
parent d8ddc608aa
commit bf6760347e
7 changed files with 17244 additions and 15949 deletions
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92
2025-09-05_17-36-29.kicad_sym Normal file
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@@ -0,0 +1,92 @@
(kicad_symbol_lib (version 20211014) (generator kicad_symbol_editor)
(symbol "5031821852" (pin_names (offset 0.254)) (in_bom yes) (on_board yes)
(property "Reference" "J" (id 0) (at 25.4 10.16 0)
(effects (font (size 1.524 1.524)))
)
(property "Value" "5031821852" (id 1) (at 25.4 7.62 0)
(effects (font (size 1.524 1.524)))
)
(property "Footprint" "503182-1852_MOL" (id 2) (at 0 0 0)
(effects (font (size 1.27 1.27) italic) hide)
)
(property "Datasheet" "https://www.molex.com/en-us/products/part-detail-pdf/5031821852?display=pdf" (id 3) (at 0 0 0)
(effects (font (size 1.27 1.27) italic) hide)
)
(property "ki_keywords" "5031821852" (id 4) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_locked" "" (id 5) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_fp_filters" "503182-1852_MOL" (id 6) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(symbol "5031821852_0_1"
(polyline
(pts
(xy 7.62 5.08)
(xy 7.62 -12.7)
)
(stroke (width 0.127) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy 7.62 -12.7)
(xy 43.18 -12.7)
)
(stroke (width 0.127) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy 43.18 -12.7)
(xy 43.18 5.08)
)
(stroke (width 0.127) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy 43.18 5.08)
(xy 7.62 5.08)
)
(stroke (width 0.127) (type default) (color 0 0 0 0))
(fill (type none))
)
(pin bidirectional line (at 0 0 0) (length 7.62)
(name "DATA_2" (effects (font (size 1.27 1.27))))
(number "1" (effects (font (size 1.27 1.27))))
)
(pin bidirectional line (at 0 -2.54 0) (length 7.62)
(name "CD/DAT_3" (effects (font (size 1.27 1.27))))
(number "2" (effects (font (size 1.27 1.27))))
)
(pin unspecified line (at 0 -5.08 0) (length 7.62)
(name "CMD" (effects (font (size 1.27 1.27))))
(number "3" (effects (font (size 1.27 1.27))))
)
(pin power_in line (at 0 -7.62 0) (length 7.62)
(name "VDD" (effects (font (size 1.27 1.27))))
(number "4" (effects (font (size 1.27 1.27))))
)
(pin unspecified line (at 50.8 -7.62 180) (length 7.62)
(name "CLK" (effects (font (size 1.27 1.27))))
(number "5" (effects (font (size 1.27 1.27))))
)
(pin power_out line (at 50.8 -5.08 180) (length 7.62)
(name "VSS" (effects (font (size 1.27 1.27))))
(number "6" (effects (font (size 1.27 1.27))))
)
(pin bidirectional line (at 50.8 -2.54 180) (length 7.62)
(name "DAT0" (effects (font (size 1.27 1.27))))
(number "7" (effects (font (size 1.27 1.27))))
)
(pin bidirectional line (at 50.8 0 180) (length 7.62)
(name "DAT1" (effects (font (size 1.27 1.27))))
(number "8" (effects (font (size 1.27 1.27))))
)
)
)
)

31290
RTmFM.kicad_pcb
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1242
RTmFM.kicad_sch
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File diff suppressed because it is too large Load Diff

3
firmware/Test/Makefile
View File

@@ -12,7 +12,8 @@ BIN=bin/$(SKETCH).ino.bin
#IP=$(shell avahi-resolve -n $(HOST).local | cut -f2 -d' ')
$(BIN): $(SKETCH).ino datastream.h
arduino-cli compile --fqbn $(BOARD) --board-options "freq=300,arch=riscv" --output-dir bin --build-path build
#arduino-cli compile --fqbn $(BOARD) --board-options "freq=300,arch=riscv" --output-dir bin --build-path build
arduino-cli compile --fqbn $(BOARD) --board-options "freq=300" --output-dir bin --build-path build
upload: $(BIN)
arduino-cli upload --fqbn $(BOARD) -p $(PORT) --input-dir bin

477
firmware/Test/Test.ino
View File

@@ -1,31 +1,54 @@
#include <CLI.h>
#include <SdFat.h>
#include "datastream.h"
#define SDIO_CLK 16
#define SDIO_CMD 17
#define SDIO_DAT0 18
#define SDIO_DAT1 19
#define SDIO_DAT2 20
#define SDIO_DAT3 21
#define SECTOR_128 0
#define SECTOR_256 1
#define SECTOR_512 2
#define SECTOR_1024 3
#define INDEX 13
#define DOUT 12
#define STEP 7
#define DIR 8
#define SEEK_DONE 9
#define TRACK0 10
#define HSEL0 4
#define HSEL1 5
#define HSEL2 6
#define HSEL3 7
static PIOProgram datastreamPgm(&datastream_program);
PIO pio;
int sm;
int offset;
int dma;
uint32_t loadtime;
uint32_t current_head = 0;
uint32_t current_cyl = 0;
uint32_t current_sector = 0;
#define POLY16 0x1021
#define POLY32 0xa00805
#define CQ16(V, C, P) C = crc16(V, C, P); queue(mfm_encode(V))
#define CQ32(V, C, P) C = crc32(V, C, P); queue(mfm_encode(V))
#define NUM_SECTORS 17
#define TRACK_SIZE (512 * NUM_SECTORS)
uint8_t *track_data;
uint8_t track_data[512 * 17 * 16];
#define OPT_HEADER_CRC16 0x00000001
#define OPT_HEADER_CRC32 0x00000002
@@ -34,16 +57,19 @@ uint8_t *track_data;
#define OPT_DATA_CRC32 0x00000008
#define OPT_DATA_CRC_MASK 0xFFFFFFF3
SdFs sd;
FsFile mounted_file;
struct disk_format {
uint16_t cyls;
uint8_t heads;
uint8_t sectors;
uint8_t sector_size;
uint8_t track_pregap;
uint8_t track_postgap;
uint8_t header_postgap;
uint8_t data_postgap;
uint32_t index_width;
uint32_t track_pregap;
uint32_t track_postgap;
uint32_t header_postgap;
uint32_t data_postgap;
float data_rate;
uint32_t flags;
uint32_t header_poly;
@@ -64,10 +90,11 @@ struct disk_format RD54 = {
15, // Heads
17, // Sectors,
SECTOR_512, // Bytes per sector
151, // Track pregap
151, // Track postgap
16, // Header postgap
50, // Data postgap
10, // Index width - how long the index pulse is low
290, // Track pregap - Time between index pulse and first sync byte
1100, // Track postgap - Time between last sync byte and index pulse
41, // Header postgap - Time between header sync byte and data sync byte
911, // Data postgap - Time between data sync byte and header sync byte of next sector
5000000, // Data Rate
OPT_HEADER_CRC16 | OPT_DATA_CRC32,
0x1021, // Header CRC polynomial
@@ -75,6 +102,10 @@ struct disk_format RD54 = {
};
struct sector {
uint16_t header[10];
uint16_t data[520];
};
struct disk_format *format;
@@ -120,8 +151,6 @@ uint32_t crc32(uint8_t val, uint32_t crc, uint32_t poly)
uint8_t last_bit = 0;
uint16_t mfm_encode_bit(uint8_t b) {
if (b == 0x80) {
last_bit = 1;
return 0b01;
@@ -136,7 +165,10 @@ uint16_t mfm_encode_bit(uint8_t b) {
}
}
uint16_t mfm_encode(uint8_t b) {
uint16_t mfm_encode(uint8_t b, bool reset = false) {
if (reset) {
last_bit = 0;
}
uint16_t out = 0;
@@ -149,120 +181,202 @@ uint16_t mfm_encode(uint8_t b) {
return out;
}
static inline void queue(uint16_t val) {
while(pio_sm_is_tx_fifo_full(pio, sm));
pio->txf[sm] = val;
}
void sync() {
uint16_t sync = mfm_encode(0xA1);
sync &= 0b1111111111011111;
queue(sync);
}
void zero_pad() {
queue(mfm_encode(0x00));
}
void send_header(uint16_t cyl, uint8_t head, uint8_t sector, uint8_t size) {
zero_pad();
sync();
if (format->flags & OPT_HEADER_CRC16) {
uint16_t header_crc = 0xFFFF;
header_crc = crc16(0xA1, header_crc, format->header_poly);
CQ16(0xFE, header_crc, format->header_poly);
CQ16(cyl & 0xFF, header_crc, format->header_poly);
CQ16(((cyl >> 4) & 0xF0) | (head & 0x0F), header_crc, format->header_poly);
CQ16(sector, header_crc, format->header_poly);
CQ16(size, header_crc, format->header_poly);
queue(mfm_encode((header_crc >> 8) & 0xFF));
queue(mfm_encode(header_crc & 0xFF));
} else if (format->flags & OPT_HEADER_CRC32) {
uint32_t header_crc = 0xFFFFFFFF;
header_crc = crc32(0xA1, header_crc, format->header_poly);
CQ32(0xFE, header_crc, format->header_poly);
CQ32(cyl & 0xFF, header_crc, format->header_poly);
CQ32(((cyl >> 4) & 0xF0) | (head & 0x0F), header_crc, format->header_poly);
CQ32(sector, header_crc, format->header_poly);
CQ32(size, header_crc, format->header_poly);
queue(mfm_encode((header_crc >> 24) & 0xFF));
queue(mfm_encode((header_crc >> 16) & 0xFF));
queue(mfm_encode((header_crc >> 8) & 0xFF));
queue(mfm_encode(header_crc & 0xFF));
}
zero_pad();
}
void send_data(uint8_t *data, uint16_t len) {
zero_pad();
sync();
if (format->flags & OPT_DATA_CRC16) {
uint16_t data_crc = 0xFFFF;
data_crc = crc16(0xA1, data_crc, format->data_poly);
CQ16(0xFB, data_crc, format->data_poly);
for (int i = 0; i < len; i++) {
CQ16(data[i], data_crc, format->data_poly);
}
queue(mfm_encode((data_crc >> 8) & 0xFF));
queue(mfm_encode(data_crc & 0xFF));
} else if (format->flags & OPT_DATA_CRC32) {
uint32_t data_crc = 0xFFFFFFFF;
data_crc = crc32(0xA1, data_crc, format->data_poly);
CQ32(0xFB, data_crc, format->data_poly);
for (int i = 0; i < len; i++) {
CQ32(data[i], data_crc, format->data_poly);
}
queue(mfm_encode((data_crc >> 24) & 0xFF));
queue(mfm_encode((data_crc >> 16) & 0xFF));
queue(mfm_encode((data_crc >> 8) & 0xFF));
queue(mfm_encode(data_crc & 0xFF));
}
zero_pad();
}
void send_sector(uint16_t cyl, uint8_t head, uint8_t sector, uint8_t size, uint8_t *data, uint8_t pad) {
send_header(cyl, head, sector, size);
for (int i = 0; i < pad; i++) {
zero_pad();
}
uint16_t len = 0x80 << size;
send_data(data, len);
}
enum {
PH_INDEX_START,
PH_INDEX_END,
PH_TRACK_PREGAP,
PH_SEND_HEADER,
PH_HEADER_POSTGAP,
PH_SEND_DATA,
PH_DATA_POSTGAP,
PH_TRACK_POSTGAP
};
void second_cpu_thread() {
dma = dma_claim_unused_channel(true);
dma_channel_config config = dma_channel_get_default_config(dma);
channel_config_set_read_increment(&config, true);
channel_config_set_write_increment(&config, false);
channel_config_set_dreq(&config, pio_get_dreq(pio, sm, true));
channel_config_set_transfer_data_size(&config, DMA_SIZE_16);
uint32_t ts = micros();
int phase = 0;
int next_sector = 1;
current_sector = 0;
struct sector sectorA;
struct sector sectorB;
struct sector *load = &sectorA;
struct sector *send = &sectorB;
struct sector *swap;
load_sector(load, current_cyl, current_head, current_sector, &track_data[0]);
pinMode(HSEL0, INPUT);
pinMode(HSEL1, INPUT);
pinMode(HSEL2, INPUT);
pinMode(HSEL3, INPUT);
while (1) {
for (int i = 0; i < format->track_postgap; i++) {
zero_pad();
}
current_head = digitalRead(HSEL0) | (digitalRead(HSEL1) << 1) | (digitalRead(HSEL2) << 2) | (digitalRead(HSEL3) << 3);
switch (phase) {
case PH_INDEX_START: // Start index pulse
ts = micros();
format->idx_period = micros() - format->idx_ts;
format->idx_ts = micros();
digitalWrite(13, LOW);
zero_pad();
digitalWrite(13, HIGH);
for (int i = 0; i < format->track_pregap; i++) {
zero_pad();
digitalWrite(INDEX, LOW);
phase++;
break;
case PH_INDEX_END: // Index pulse timing
if ((micros() - ts) >= format->index_width) {
ts = micros();
digitalWrite(INDEX, HIGH);
phase++;
}
break;
case PH_TRACK_PREGAP: // Track pre-gap
if ((micros() - ts) >= format->track_pregap) {
ts = micros();
phase = PH_SEND_HEADER;
}
break;
case PH_SEND_HEADER:
ts = micros();
swap = load;
load = send;
send = swap;
dma_channel_configure(dma, &config,
&pio->txf[sm],
send->header,
10,
true
);
phase = PH_HEADER_POSTGAP;
break;
case PH_HEADER_POSTGAP:
if ((micros() - ts) >= format->header_postgap) {
ts = micros();
phase = PH_SEND_DATA;
}
break;
case PH_SEND_DATA:
ts = micros();
dma_channel_configure(dma, &config,
&pio->txf[sm],
send->data,
520,
true
);
next_sector = (current_sector + 1) % format->sectors;
load_sector(load, current_cyl, current_head, next_sector, &track_data[512 * next_sector]);
if (current_sector < format->sectors - 1) {
phase = PH_DATA_POSTGAP;
} else {
phase = PH_TRACK_POSTGAP;
}
break;
case PH_DATA_POSTGAP:
if ((micros() - ts) > format->data_postgap) {
ts = micros();
current_sector++;
phase = PH_SEND_HEADER;
}
break;
case PH_TRACK_POSTGAP:
if ((micros() - ts) > format->track_postgap) {
ts = micros();
current_sector = 0;
phase = PH_INDEX_START;
}
break;
}
for (int sector = 0; sector < format->sectors; sector++) {
}
}
send_sector(0, 0, sector, format->sector_size, track_data + (sector * format->slen), format->header_postgap);
void load_sector(struct sector *s, int cno, int hno, int secno, uint8_t *data) {
for (int i = 0; i < format->data_postgap; i++) {
zero_pad();
uint32_t ts = micros();
uint16_t hp = format->header_poly;
uint32_t dp = format->data_poly;
s->header[0] = 0;
s->header[1] = 0xA1;
s->header[2] = 0xFE;
s->header[3] = (cno & 0xFF);
s->header[4] = ((cno & 0xF00) >> 4) | (hno & 0x0F);
s->header[5] = secno;
s->header[6] = 0x02;
uint16_t crc = 0xFFFF;
for (int i = 1; i < 7; i++) {
crc = crc16(s->header[i], crc, hp);
}
s->header[7] = (crc >> 8) & 0xFF;
s->header[8] = crc & 0xFF;
s->header[9] = 0;
for (int i = 0; i < 10; i++) {
s->header[i] = mfm_encode(s->header[i], i == 0);
}
s->header[1] &= 0b1111111111011111;
s->data[0] = 0;
s->data[1] = 0xA1;
s->data[2] = 0xFB;
for (int i = 0; i < 512; i++) {
s->data[3 + i] = data[i];
}
uint32_t c32 = 0xFFFFFFFF;
for (int i = 1; i < 515; i++) {
c32 = crc32(s->data[i], c32, dp);
}
s->data[515] = (c32 >> 24) & 0xFF;
s->data[516] = (c32 >> 16) & 0xFF;
s->data[517] = (c32 >> 8) & 0xFF;
s->data[518] = c32 & 0xFF;
s->data[519] = 0;
for (int i = 0; i < 520; i++) {
s->data[i] = mfm_encode(s->data[i], i == 0);
}
s->data[1] &= 0b1111111111011111;
loadtime = micros() - ts;
}
void load_cyl(FsFile file, uint8_t *data, uint32_t cyl, uint32_t heads, uint32_t sectors, uint32_t sectorsize) {
uint32_t len = 0x80 << sectorsize;
len *= sectors;
len *= heads;
uint32_t offset = cyl * len;
file.seekSet(offset);
file.read(data, len);
}
@@ -343,14 +457,35 @@ CLI_COMMAND(cli_status) {
dev->print("Requested Data Rate: ");
dev->print(format->data_rate);
dev->println("MHz");
dev->println("Hz");
dev->print("Actual Data Rate: ");
dev->print(F_CPU / format->clock_div / 20.0);
dev->println("MHz");
dev->println("Hz");
dev->print("Clock divider: ");
dev->println(format->clock_div);
dev->println();
dev->print("PIO: ");
dev->println(PIO_NUM(pio));
dev->print("State Machine: ");
dev->println(sm);
dev->print("Offset: ");
dev->println(offset);
dev->println();
dev->print("Load time: ");
dev->print(loadtime);
dev->println("uS");
dev->println();
dev->print("Current C/H/S: ");
dev->print(current_cyl);
dev->print("/");
dev->print(current_head);
dev->print("/");
dev->println(current_sector);
return 0;
}
@@ -458,9 +593,93 @@ CLI_COMMAND(cli_set) {
return 10;
}
CLI_COMMAND(cli_ls) {
sd.ls(LS_A | LS_DATE | LS_SIZE);
return 0;
}
CLI_COMMAND(cli_create) {
if (argc != 2) {
dev->println("Usage: create <filename>");
dev->println("Create a new image file using the current disk format");
return 10;
}
if (sd.exists(argv[1])) {
dev->println("File already exists");
return 10;
}
uint32_t disk_size = 0x80 << format->sector_size;
disk_size *= format->sectors;
disk_size *= format->heads;
disk_size *= format->cyls;
dev->println("Creating new file, please wait...");
FsFile newfile;
newfile.open(argv[1], O_RDWR | O_CREAT);
newfile.preAllocate(disk_size);
newfile.close();
return 0;
}
CLI_COMMAND(cli_mount) {
if (argc != 2) {
dev->println("Usage: mount <filename>");
dev->println("Mount an image file as the virtual disk");
return 10;
}
if (!sd.exists(argv[1])) {
dev->println("File not found");
return 10;
}
mounted_file = sd.open(argv[1], O_RDWR);
current_cyl = 0;
current_head = 0;
load_cyl(mounted_file, track_data, current_cyl, format->heads, format->sectors, format->sector_size);
return 0;
}
void do_step() {
digitalWrite(SEEK_DONE, LOW);
int dir = digitalRead(DIR);
if (dir == 1 && current_cyl == 0) {
// No can do.
digitalWrite(SEEK_DONE, HIGH);
return;
}
if (dir == 1) {
current_cyl --;
} else {
current_cyl ++;
}
if (current_cyl >= format->cyls) {
current_cyl = 0;
}
load_cyl(mounted_file, track_data, current_cyl, format->heads, format->sectors, format->sector_size);
digitalWrite(TRACK0, current_cyl == 0);
digitalWrite(SEEK_DONE, HIGH);
}
void setup() {
if (!sd.begin(SdioConfig(SDIO_CLK, SDIO_CMD, SDIO_DAT0, 1.5))) {
sd.initErrorPrint();
}
datastreamPgm.prepare(&pio, &sm, &offset);
datastream_program_init(pio, sm, offset);
datastream_program_init(pio, sm, offset, DOUT);
pio_sm_set_enabled(pio, sm, true);
pio->txf[sm] = mfm_encode(0x00);
@@ -474,9 +693,7 @@ void setup() {
format->slen = 0x80 << format->sector_size;
format->tlen = format->slen * format->sectors;
track_data = (uint8_t *)malloc(format->tlen);
for (int i = 0; i < format->tlen; i++) {
for (int i = 0; i < 512 * 17; i++) {
track_data[i] = rand();
}
@@ -492,6 +709,18 @@ void setup() {
CLI.addCommand("status", cli_status);
CLI.addCommand("set", cli_set);
CLI.addCommand("ls", cli_ls);
CLI.addCommand("create", cli_create);
CLI.addCommand("mount", cli_mount);
pinMode(STEP, INPUT);
pinMode(DIR, INPUT);
pinMode(SEEK_DONE, OUTPUT);
digitalWrite(SEEK_DONE, HIGH);
pinMode(TRACK0, OUTPUT);
digitalWrite(TRACK0, current_cyl == 0);
attachInterrupt(STEP, do_step, RISING);
}
void loop() {

10
firmware/Test/datastream.pio
View File

@@ -26,17 +26,17 @@ loop:
% c-sdk {
static inline void datastream_program_init(PIO pio, uint sm, uint offset) {
static inline void datastream_program_init(PIO pio, uint sm, uint offset, int dout) {
pio_set_gpio_base(pio, 0);
pio_gpio_init(pio, 12);
pio_sm_set_consecutive_pindirs(pio, sm, 12, 1, true);
pio_gpio_init(pio, dout);
pio_sm_set_consecutive_pindirs(pio, sm, dout, 1, true);
pio_sm_config c = datastream_program_get_default_config(offset);
sm_config_set_out_shift(&c, false, false, 0);
sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
sm_config_set_clkdiv(&c, 3.0);
sm_config_set_out_pin_base(&c, 12);
sm_config_set_out_pin_base(&c, dout);
sm_config_set_out_pin_count(&c, 1);
sm_config_set_set_pin_base(&c, 12);
sm_config_set_set_pin_base(&c, dout);
sm_config_set_set_pin_count(&c, 1);
pio_sm_init(pio, sm, offset, &c);
}

69
footprints.pretty/503182-1852_MOL.kicad_mod Normal file
View File

@@ -0,0 +1,69 @@
(footprint "503182-1852_MOL" (version 20211014) (generator pcbnew)
(layer "F.Cu")
(tags "5031821852 ")
(attr smd)
(fp_text reference "REF**" (at 0 5.610299 unlocked) (layer F.SilkS)
(effects (font (size 1 1) (thickness 0.15)))
)
(fp_text value 503182-1852_MOL (at 0 5.610299 unlocked) (layer F.Fab)
(effects (font (size 1 1) (thickness 0.15)))
)
(fp_text user "${REFERENCE}" (at 0 5.610299 unlocked) (layer F.Fab)
(effects (font (size 1 1) (thickness 0.15)))
)
(fp_line (start -1.8367 19.190798) (end -1.8367 18.954898) (layer "F.CrtYd") (width 0.1524))
(fp_arc (start -8.22544 5.991276) (mid -8.6106 5.610299) (end -8.22544 5.229321) (layer "F.SilkS") (width 0.508))
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