diff options
Diffstat (limited to '')
| -rw-r--r-- | main.c | 125 |
1 files changed, 88 insertions, 37 deletions
@@ -19,6 +19,13 @@ #include "tusb_desc.c" +//#define DEBUG +#ifdef DEBUG + #define dprintf(...) printf(__VA_ARGS__) +#else + #define dprintf(...) +#endif + #define COL_GRN 0x33000000 #define COL_RED 0x00330000 @@ -59,11 +66,11 @@ enum const static uint8_t sr_pins[SR_PIN_CNT] = { - [SR_IN] = 9, - [SR_nOE] = 10, - [SR_RCLK] = 11, - [SR_SCLK] = 12, - [SR_nCLR] = 13, + [SR_IN] = 28, // rIN + [SR_nCLR] = 14, // rCLR + [SR_SCLK] = 13, // rSCLK + [SR_RCLK] = 12, // rRCLK + [SR_nOE] = 11, // rSOE }; const static uint8_t sr_pins_def[SR_PIN_CNT] = @@ -72,7 +79,7 @@ const static uint8_t sr_pins_def[SR_PIN_CNT] = [SR_nOE] = 1, [SR_RCLK] = 0, [SR_SCLK] = 0, - [SR_nCLR] = 1, + [SR_nCLR] = 0, }; @@ -87,20 +94,20 @@ enum const static uint8_t rom_pins[ROM_PIN_CNT] = { - [ROM_nWE] = 14, - [ROM_nOE] = 15, - [ROM_nCE] = 26, + [ROM_nCE] = 27, // rCS + [ROM_nOE] = 26, // rOE + [ROM_nWE] = 15, // rWE }; const static uint8_t rom_pins_def[ROM_PIN_CNT] = { [ROM_nWE] = 1, [ROM_nOE] = 1, - [ROM_nCE] = 0, + [ROM_nCE] = 1, }; -#define PIN_IO_OE 29 +#define PIN_IO_OE 10 // rDOE #define PIN_IO_OE_DEF 1 const static uint8_t io_pins[8] = @@ -111,8 +118,8 @@ const static uint8_t io_pins[8] = 5, 6, 7, - 27, - 28 + 8, + 9 }; @@ -187,6 +194,37 @@ static void set_addr(uint16_t addr) sleep_ns(24); } +static void send_byte(uint16_t addr, uint8_t data) +{ + set_addr(addr); + + for(int k = 0; k < 8; k++) + gpio_put(io_pins[k], (data >> k) & 1); + + sleep_ns(50); + + gpio_put(rom_pins[ROM_nWE], 0); + sleep_ns(150); + + gpio_put(rom_pins[ROM_nWE], 1); + sleep_ns(50); +} + +static void chip_erase(void) +{ + writemode(); + gpio_put(rom_pins[ROM_nOE], 1); + + send_byte(0x5555, 0xAA); + send_byte(0x2AAA, 0x55); + send_byte(0x5555, 0x80); + send_byte(0x5555, 0xAA); + send_byte(0x2AAA, 0x55); + send_byte(0x5555, 0x10); + + busy_wait_ms(20); +} + void core1_main(void) { while(1) @@ -197,6 +235,8 @@ void core1_main(void) writemode(); gpio_put(rom_pins[ROM_nOE], 1); + if((pending % EEPROM_BLK_SZ) > 0) printf("core1: non-page write!\n"); + int pages = (pending / EEPROM_BLK_SZ) + ((pending % EEPROM_BLK_SZ) ? 1 : 0); for(int i = 0; i < pages; i++) { @@ -221,7 +261,7 @@ void core1_main(void) busy_wait_ms(10); } - printf("core1: wrote %d bytes to %04x\n", pending, writeoffset); + dprintf("core1: wrote %d bytes to %04x\n", pending, writeoffset); pending = 0; mutex_exit(&busy_lock); } @@ -231,12 +271,15 @@ void core1_main(void) int main(void) { board_init(); - tusb_init(); - stdio_init_all(); - gpio_init(PIN_RGB); - gpio_set_dir(PIN_RGB, GPIO_OUT); - gpio_put(PIN_RGB, 0); + for(int i = 0; i < ROM_PIN_CNT; i++) + { + gpio_init(rom_pins[i]); + gpio_set_dir(rom_pins[i], GPIO_OUT); + gpio_put(rom_pins[i], rom_pins_def[i]); + } + + readmode(); gpio_init(PIN_IO_OE); gpio_set_dir(PIN_IO_OE, GPIO_OUT); @@ -249,14 +292,15 @@ int main(void) gpio_put(sr_pins[i], sr_pins_def[i]); } - for(int i = 0; i < ROM_PIN_CNT; i++) - { - gpio_init(rom_pins[i]); - gpio_set_dir(rom_pins[i], GPIO_OUT); - gpio_put(rom_pins[i], rom_pins_def[i]); - } + gpio_init(PIN_RGB); + gpio_set_dir(PIN_RGB, GPIO_OUT); + gpio_put(PIN_RGB, 0); + + tusb_init(); + stdio_init_all(); + + gpio_put(rom_pins[ROM_nCE], 0); - readmode(); int sm = 0; // XXX: ??? uint32_t offset = pio_add_program(pio0, &ws2812_program); @@ -270,10 +314,17 @@ int main(void) multicore_reset_core1(); multicore_launch_core1(core1_main); - sleep_ms(1000); - - printf("Hell, world...\n"); + printf("28C256 USB MSC. Firmware ver 1.0\n"); + printf("2024 (C) dweller@cabin.digital\n\n"); + + /* + * TODO: SCSI erase/format? + printf("Erasing chip...\n"); + chip_erase(); + printf("Done!\n"); + while(1); + */ uint32_t prev = access; uint32_t start_ms = 0; @@ -326,12 +377,12 @@ void tud_msc_inquiry_cb(uint8_t lun, uint8_t vendor_id[8], uint8_t product_id[16 memcpy(product_id , pid, strlen(pid)); memcpy(product_rev, rev, strlen(rev)); - printf("scsi: inq\n"); + dprintf("scsi: inq\n"); } bool tud_msc_test_unit_ready_cb(uint8_t lun) { - printf("scsi: rdy\n"); + dprintf("scsi: rdy\n"); return true; } @@ -341,12 +392,12 @@ void tud_msc_capacity_cb(uint8_t lun, uint32_t* block_count, uint16_t* block_siz *block_count = BLKS; *block_size = BLK_SZ; - printf("scsi: cap\n"); + dprintf("scsi: cap\n"); } bool tud_msc_start_stop_cb(uint8_t lun, uint8_t power_condition, bool start, bool load_eject) { - printf("scsi: stop\n"); + dprintf("scsi: stop\n"); if(load_eject) { @@ -367,7 +418,7 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff int addr = (lba * BLK_SZ) + offset; - printf("scsi: read @ %04X\n", addr); + dprintf("scsi: read @ %04X\n", addr); readmode(); @@ -396,7 +447,7 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff bool tud_msc_is_writable_cb(uint8_t lun) { - printf("scsi: rw?\n"); + dprintf("scsi: rw?\n"); return true; } @@ -411,7 +462,7 @@ int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t* writeoffset = (lba * BLK_SZ) + offset; - printf("scsi: write req @ %04x\n", writeoffset); + dprintf("scsi: write req @ %04x\n", writeoffset); memcpy(writebuf, buffer, bufsize); pending = bufsize; @@ -446,7 +497,7 @@ int32_t tud_msc_scsi_cb(uint8_t lun, uint8_t const scsi_cmd[16], void* buffer, u } } - printf("scsi: generic\n"); + dprintf("scsi: generic\n"); return resplen; } |