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Изменения кода с PIMP #4

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29f256a
Fixes from PIMP
Bs0Dd Feb 8, 2026
b18d938
New README
Bs0Dd Feb 8, 2026
b6cc5e2
Extra tabulation
Bs0Dd Feb 8, 2026
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8 changes: 5 additions & 3 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -2,18 +2,20 @@
Модуль памяти для "Электроника МК 90" на основе микроконтроллера STM32.

**Возможности:**
- Простое копирование образов картриджей - при подключении к ПК модуль работает как флешка;
- Простое копирование образов картриджей - при подключении к ПК модуль работает как флешка (~90КБ);
- При подключении к МК90 модуль монтирует autorun.bin или первый попавшийся образ и работает как обычный МПО/СМП (только на чтение);
- Поддержка (только на чтение) протокола [Genjitsu SMP](https://github.com/vladkorotnev/SMPEmu/tree/master/pdp) благодаря чему можно загрузить несколько образов и выбирать нужный из списка непосредственно на МК90.

На текущий момент готова [прошивка](https://github.com/azya52/STMP/tree/master/STMP/Debug) для популярной (и дешевой, около 3.5$ вместе с программатором) отладочной платы "Blue Pill" на микроконтроллере STM32F103C8T6.

<img src="/HW/DSC05896.JPG?raw=true" width="49%"> <img src="/HW/DSC05900.JPG?raw=true" width="49%">

Если необходим больший размер накопителя (90КБ не хватит на некоторое ПО для МК90) - для сборки доступен модуль на базе Raspberry Pi Pico (~1.8МБ) - [PIMP](https://github.com/azya52/PIMP).

**Что понадобится:**
- Сама отладочная плата Blue Pill;
- Программатор, в качестве которого можно использовать ST-Link или любой адаптер USB-UART (или Arduino);
- Пара резисторов.
- Пара-тройка резисторов.

**Схема подключения**

Expand All @@ -25,5 +27,5 @@

**Мультикартридж**

Для возможности выбора образа из нескольких непосредственно на МК90, достаточно скопировать [загрузчик](https://github.com/vladkorotnev/SMPEmu/blob/master/pdp/smp0.bin) на модуль, переименовав в autorun.bin и конечно скопировать нужные образы.
Для возможности выбора образа из нескольких непосредственно на МК90, достаточно скопировать [загрузчик](https://github.com/vladkorotnev/SMPEmu/blob/master/pdp/autorun.bin) на модуль и конечно скопировать нужные образы.

167 changes: 90 additions & 77 deletions STMP/Src/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -31,12 +31,12 @@ static void MX_GPIO_Init(void);
static void PVD_Config();

static FRESULT openFile(char *filename) {
DIR dj;
FILINFO fno;
FRESULT fr;
DIR dj;
FILINFO fno;
FRESULT fr;

fr = f_opendir(&dj, "");
if(fr == FR_OK){
fr = f_opendir(&dj, "");
if(fr == FR_OK){
uint32_t i = 0;
do {
fr = f_readdir(&dj, &fno);
Expand All @@ -45,37 +45,37 @@ static FRESULT openFile(char *filename) {
}
} while (fr == FR_OK && i<255 && fno.fname[0] != 0);
f_closedir(&dj);
}
}

if(filename != NULL) {
fr = f_open(&appFile, filename, FA_READ);
}
if(filename != NULL) {
fr = f_open(&appFile, filename, FA_READ);
}

if (fr != FR_OK && fileList[0]) {
fr = f_open(&appFile, fileList[0], FA_READ);
}
if (fr != FR_OK && fileList[0]) {
fr = f_open(&appFile, fileList[0], FA_READ);
}

if (fr == FR_OK) {
uint32_t lktbl[256];
if (fr == FR_OK) {
uint32_t lktbl[256];
lktbl[0] = 256;
appFile.cltbl = lktbl;
fr = f_lseek(&appFile, CREATE_LINKMAP);
}

return fr;
return fr;
}

static void fastGpioInitOutputPP(GPIO_TypeDef *GPIOx, uint32_t pinNum) {
#define GPIO_CR_CNF_GP_OUTPUT_PP 0x00000000U
uint32_t position = ((pinNum - 8U) << 2);
MODIFY_REG(GPIOx->CRH, ((GPIO_CRL_MODE0 | GPIO_CRL_CNF0) << position),
((GPIO_SPEED_FREQ_HIGH + GPIO_CR_CNF_GP_OUTPUT_PP) << position));
MODIFY_REG(GPIOx->CRH, ((GPIO_CRL_MODE0 | GPIO_CRL_CNF0) << position),
((GPIO_SPEED_FREQ_HIGH + GPIO_CR_CNF_GP_OUTPUT_PP) << position));
}

static void fastGpioInitOutputPP_DATA(void) {
#define GPIO_CR_CNF_GP_OUTPUT_OD 0x00000004U
MODIFY_REG(PORT_DATA->CRH, ((GPIO_CRL_MODE0 | GPIO_CRL_CNF0) << ((PIN_DATA_NUM - 8) << 2)),
((GPIO_SPEED_FREQ_HIGH + GPIO_CR_CNF_GP_OUTPUT_PP) << ((PIN_DATA_NUM - 8) << 2)));
MODIFY_REG(PORT_DATA->CRH, ((GPIO_CRL_MODE0 | GPIO_CRL_CNF0) << ((PIN_DATA_NUM - 8) << 2)),
((GPIO_SPEED_FREQ_HIGH + GPIO_CR_CNF_GP_OUTPUT_PP) << ((PIN_DATA_NUM - 8) << 2)));
}

static void fastGpioInitInputPU(GPIO_TypeDef *GPIOx, uint32_t pinNum) {
Expand All @@ -84,12 +84,12 @@ static void fastGpioInitInputPU(GPIO_TypeDef *GPIOx, uint32_t pinNum) {
uint32_t position = (pinNum < 8) ? (pinNum << 2U) : ((pinNum - 8U) << 2U);
__IO uint32_t *configregister = (pinNum < 8) ? &GPIOx->CRL : &GPIOx->CRH;
GPIOx->BSRR = 0x01U << pinNum; //pull-up
MODIFY_REG(*configregister, ((GPIO_CRL_MODE0 | GPIO_CRL_CNF0) << position),
((GPIO_CR_MODE_INPUT + GPIO_CR_CNF_INPUT_PU_PD) << position));
MODIFY_REG(*configregister, ((GPIO_CRL_MODE0 | GPIO_CRL_CNF0) << position),
((GPIO_CR_MODE_INPUT + GPIO_CR_CNF_INPUT_PU_PD) << position));
}

static void fastGpioInitEvtFal(GPIO_TypeDef *GPIOx, uint32_t pinNum) {
__HAL_RCC_AFIO_CLK_ENABLE();
__HAL_RCC_AFIO_CLK_ENABLE();
MODIFY_REG(AFIO->EXTICR[pinNum >> 2], (0x0F << (4 * (pinNum & 0x03))),
(GPIO_GET_INDEX(GPIOx)) << (4 * (pinNum & 0x03)));

Expand Down Expand Up @@ -151,6 +151,9 @@ static void parseCommand(uint32_t command) {
break;
}

// read postdecrement
case 0x18:
case 0x10:
// read postincrement
case 0xD8:
case 0xD0: {
Expand All @@ -159,6 +162,7 @@ static void parseCommand(uint32_t command) {

while ((PORT_SELECT->IDR & PIN_SELECT) == GPIO_PIN_RESET) {
sendByte(readBuffer);
if ((command & 0xC0) == 0) f_lseek(&appFile, appFile.fptr - 2); // postdecrement
f_read_byte(&appFile, &readBuffer);
}

Expand All @@ -170,23 +174,25 @@ static void parseCommand(uint32_t command) {
break;
}

// Genjitsu: get files list
case 0xF0: {
fastGpioInitOutputPP_DATA();
uint32_t i = 0;
uint32_t j = 0;

do {
j = 0;
do {
sendByte(fileList[i][j]);
} while (fileList[i][j++]);
} while (fileList[i++][0]);
do {
j = 0;
do {
sendByte(fileList[i][j]);
} while (fileList[i][j++]);
} while (fileList[i++][0]);

sendByte(0xFF);
fastGpioInitInputPU(PORT_DATA, PIN_DATA_NUM);
break;
}

// Genjitsu: mount selected file
case 0xF1: {
char filename[12+1] = {0,};
uint32_t i = 0;
Expand All @@ -201,9 +207,16 @@ static void parseCommand(uint32_t command) {
break;
}

// unknown command
// Genjitsu: unmount current file and go to the autorun
case 0xF2: {
if (openFile("AUTORUN.BIN") != FR_OK) {
Error_Handler();
}
break;
}

// unknown command - just ignore
default: {
Error_Handler();
break;
}
}
Expand All @@ -225,7 +238,7 @@ int main(void) {
HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFE);
SystemClock_Config();
if(f_mount(&FATFS_Obj, "0", 1) == FR_OK) {
openFile("autorun.bin");
openFile("AUTORUN.BIN");
}
} else {
HAL_PWR_EnterSLEEPMode(0, PWR_SLEEPENTRY_WFE);
Expand All @@ -244,40 +257,40 @@ int main(void) {
* @retval None
*/
static void SystemClock_Config(void) {
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
Error_Handler();
}

/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
Error_Handler();
}

/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK) {
Error_Handler();
}

PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLL;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
Error_Handler();
}
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK) {
Error_Handler();
}

PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLL;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
Error_Handler();
}
}

static void MX_GPIO_PullUp(void) {
Expand All @@ -304,30 +317,30 @@ static void MX_GPIO_PullUp(void) {
* @retval None
*/
static void MX_GPIO_Init(void) {
fastGpioInitInputPU(PORT_DATA, PIN_DATA_NUM);
fastGpioInitInputPU(PORT_SELECT, PIN_SELECT_NUM);
fastGpioInitEvtFal(PORT_SELECT, PIN_SELECT_NUM);
fastGpioInitInputPU(PORT_CLK, PIN_CLK_NUM);
fastGpioInitEvtFal(PORT_CLK, PIN_CLK_NUM);
fastGpioInitOutputPP(PORT_LED, PIN_LED_NUM);
fastGpioInitInputPU(PORT_DATA, PIN_DATA_NUM);
fastGpioInitInputPU(PORT_SELECT, PIN_SELECT_NUM);
fastGpioInitEvtFal(PORT_SELECT, PIN_SELECT_NUM);
fastGpioInitInputPU(PORT_CLK, PIN_CLK_NUM);
fastGpioInitEvtFal(PORT_CLK, PIN_CLK_NUM);
fastGpioInitOutputPP(PORT_LED, PIN_LED_NUM);
}


static void PVD_Config() {
__HAL_RCC_PWR_CLK_ENABLE(); //Enable Power Clock

HAL_NVIC_SetPriority(PVD_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(PVD_IRQn);
HAL_NVIC_EnableIRQ(PVD_IRQn);

PWR_PVDTypeDef sConfigPVD;
sConfigPVD.PVDLevel = PWR_CR_PLS_2V9;
sConfigPVD.Mode = PWR_PVD_MODE_IT_RISING;
HAL_PWR_ConfigPVD(&sConfigPVD); //event on supply voltage < 2.8V
HAL_PWR_EnablePVD();
PWR_PVDTypeDef sConfigPVD;
sConfigPVD.PVDLevel = PWR_CR_PLS_2V9;
sConfigPVD.Mode = PWR_PVD_MODE_IT_RISING;
HAL_PWR_ConfigPVD(&sConfigPVD); //event on supply voltage < 2.8V
HAL_PWR_EnablePVD();
}

void PVD_IRQHandler(void) {
HAL_PWR_PVD_IRQHandler();
HAL_PWR_PVD_IRQHandler();
}

/**
Expand Down
4 changes: 3 additions & 1 deletion STMP/fatfs/ff.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3832,7 +3832,9 @@ FRESULT f_read_byte (
FATFS *fs = fp->obj.fs;

if (fp->obj.objsize - fp->fptr<=0) {
LEAVE_FF(fs, FR_DISK_ERR);
*buff = 0xFF; // end of "cartridge", just return 0xFF :-)
fp->fptr++;
LEAVE_FF(fs, FR_OK);
}

if ((fp->fptr % SS(fs)) == 0) {
Expand Down