void i2cInit(I2CDevice device)
{
/*## Configure the I2C clock source. The clock is derived from the SYSCLK #*/
// RCC_PeriphCLKInitTypeDef RCC_PeriphCLKInitStruct;
// RCC_PeriphCLKInitStruct.PeriphClockSelection = i2cHardwareMap[device].clk;
// RCC_PeriphCLKInitStruct.I2c1ClockSelection = i2cHardwareMap[device].clk_src;
// HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphCLKInitStruct);
switch (device) {
case I2CDEV_1:
__HAL_RCC_I2C1_CLK_ENABLE();
break;
case I2CDEV_2:
__HAL_RCC_I2C2_CLK_ENABLE();
break;
case I2CDEV_3:
__HAL_RCC_I2C3_CLK_ENABLE();
break;
case I2CDEV_4:
__HAL_RCC_I2C4_CLK_ENABLE();
break;
default:
break;
}
if (device == I2CINVALID)
return;
i2cDevice_t *i2c;
i2c = &(i2cHardwareMap[device]);
//I2C_InitTypeDef i2cInit;
IO_t scl = IOGetByTag(i2c->scl);
IO_t sda = IOGetByTag(i2c->sda);
IOInit(scl, OWNER_I2C_SCL, RESOURCE_INDEX(device));
IOInit(sda, OWNER_I2C_SDA, RESOURCE_INDEX(device));
// Enable RCC
RCC_ClockCmd(i2c->rcc, ENABLE);
i2cUnstick(scl, sda);
// Init pins
#ifdef STM32F7
IOConfigGPIOAF(scl, IOCFG_I2C, i2c->af);
IOConfigGPIOAF(sda, IOCFG_I2C, i2c->af);
#else
IOConfigGPIO(scl, IOCFG_AF_OD);
IOConfigGPIO(sda, IOCFG_AF_OD);
#endif
// Init I2C peripheral
HAL_I2C_DeInit(&i2cHandle[device].Handle);
i2cHandle[device].Handle.Instance = i2cHardwareMap[device].dev;
/// TODO: HAL check if I2C timing is correct
i2cHandle[device].Handle.Init.Timing = 0x00B01B59;
//i2cHandle[device].Handle.Init.Timing = 0x00D00E28; /* (Rise time = 120ns, Fall time = 25ns) */
i2cHandle[device].Handle.Init.OwnAddress1 = 0x0;
i2cHandle[device].Handle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
i2cHandle[device].Handle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
i2cHandle[device].Handle.Init.OwnAddress2 = 0x0;
i2cHandle[device].Handle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
i2cHandle[device].Handle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
HAL_I2C_Init(&i2cHandle[device].Handle);
/* Enable the Analog I2C Filter */
HAL_I2CEx_ConfigAnalogFilter(&i2cHandle[device].Handle,I2C_ANALOGFILTER_ENABLE);
HAL_NVIC_SetPriority(i2cHardwareMap[device].er_irq, NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_ER), NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_ER));
HAL_NVIC_EnableIRQ(i2cHardwareMap[device].er_irq);
HAL_NVIC_SetPriority(i2cHardwareMap[device].ev_irq, NVIC_PRIORITY_BASE(NVIC_PRIO_I2C_EV), NVIC_PRIORITY_SUB(NVIC_PRIO_I2C_EV));
HAL_NVIC_EnableIRQ(i2cHardwareMap[device].ev_irq);
}
void enableGPIOPowerUsageAndNoiseReductions(void)
{
// AHB1
__HAL_RCC_BKPSRAM_CLK_ENABLE();
__HAL_RCC_DTCMRAMEN_CLK_ENABLE();
__HAL_RCC_DMA2_CLK_ENABLE();
__HAL_RCC_USB_OTG_HS_CLK_ENABLE();
__HAL_RCC_USB_OTG_HS_ULPI_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOI_CLK_ENABLE();
#ifndef STM32F722xx
__HAL_RCC_DMA2D_CLK_ENABLE();
__HAL_RCC_GPIOJ_CLK_ENABLE();
__HAL_RCC_GPIOK_CLK_ENABLE();
#endif
//APB1
__HAL_RCC_TIM2_CLK_ENABLE();
__HAL_RCC_TIM3_CLK_ENABLE();
__HAL_RCC_TIM4_CLK_ENABLE();
__HAL_RCC_TIM5_CLK_ENABLE();
__HAL_RCC_TIM6_CLK_ENABLE();
__HAL_RCC_TIM7_CLK_ENABLE();
__HAL_RCC_TIM12_CLK_ENABLE();
__HAL_RCC_TIM13_CLK_ENABLE();
__HAL_RCC_TIM14_CLK_ENABLE();
__HAL_RCC_LPTIM1_CLK_ENABLE();
__HAL_RCC_SPI2_CLK_ENABLE();
__HAL_RCC_SPI3_CLK_ENABLE();
__HAL_RCC_USART2_CLK_ENABLE();
__HAL_RCC_USART3_CLK_ENABLE();
__HAL_RCC_UART4_CLK_ENABLE();
__HAL_RCC_UART5_CLK_ENABLE();
__HAL_RCC_I2C1_CLK_ENABLE();
__HAL_RCC_I2C2_CLK_ENABLE();
__HAL_RCC_I2C3_CLK_ENABLE();
__HAL_RCC_CAN1_CLK_ENABLE();
__HAL_RCC_DAC_CLK_ENABLE();
__HAL_RCC_UART7_CLK_ENABLE();
__HAL_RCC_UART8_CLK_ENABLE();
#ifndef STM32F722xx
__HAL_RCC_I2C4_CLK_ENABLE();
__HAL_RCC_CAN2_CLK_ENABLE();
__HAL_RCC_CEC_CLK_ENABLE();
#endif
//APB2
__HAL_RCC_TIM1_CLK_ENABLE();
__HAL_RCC_TIM8_CLK_ENABLE();
__HAL_RCC_USART1_CLK_ENABLE();
__HAL_RCC_USART6_CLK_ENABLE();
__HAL_RCC_ADC1_CLK_ENABLE();
__HAL_RCC_ADC2_CLK_ENABLE();
__HAL_RCC_ADC3_CLK_ENABLE();
__HAL_RCC_SDMMC1_CLK_ENABLE();
__HAL_RCC_SPI1_CLK_ENABLE();
__HAL_RCC_SPI4_CLK_ENABLE();
__HAL_RCC_TIM9_CLK_ENABLE();
__HAL_RCC_TIM10_CLK_ENABLE();
__HAL_RCC_TIM11_CLK_ENABLE();
__HAL_RCC_SPI5_CLK_ENABLE();
__HAL_RCC_SAI1_CLK_ENABLE();
__HAL_RCC_SAI2_CLK_ENABLE();
#ifndef STM32F722xx
__HAL_RCC_SPI6_CLK_ENABLE();
#endif
//
// GPIO_InitTypeDef GPIO_InitStructure;
// GPIO_StructInit(&GPIO_InitStructure);
// GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; // default is un-pulled input
//
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
// GPIO_InitStructure.GPIO_Pin &= ~(GPIO_Pin_11 | GPIO_Pin_12); // leave USB D+/D- alone
//
// GPIO_InitStructure.GPIO_Pin &= ~(GPIO_Pin_13 | GPIO_Pin_14); // leave JTAG pins alone
// GPIO_Init(GPIOA, &GPIO_InitStructure);
//
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
// GPIO_Init(GPIOB, &GPIO_InitStructure);
//
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
// GPIO_Init(GPIOC, &GPIO_InitStructure);
// GPIO_Init(GPIOD, &GPIO_InitStructure);
// GPIO_Init(GPIOE, &GPIO_InitStructure);
}
/**
* @brief Initializes peripherals used by the I2C EEPROM driver.
* @param None
* @retval None
*/
void sEE_LowLevel_Init(new_twi* TwiStruct)
{
GPIO_InitTypeDef GPIO_InitStructure;
/*!< sEE_I2C_SCL_GPIO_CLK and sEE_I2C_SDA_GPIO_CLK Periph clock enable */
//RCC_APB2PeriphClockCmd(GET_PORT_CLK_ADDR[TwiStruct->SclPort] | GET_PORT_CLK_ADDR[TwiStruct->SdaPort], ENABLE);
_gpio_init(TwiStruct->SclPort);
_gpio_init(TwiStruct->SdaPort);
/*!< sEE_I2C Periph clock enable */
//RCC_APB1PeriphClockCmd(I2C_CLK[TwiStruct->TwiNr], ENABLE);
switch(TwiStruct->TwiNr)
{
#ifdef __HAL_RCC_I2C1_CLK_ENABLE
case 0:
__HAL_RCC_I2C1_CLK_ENABLE();
break;
#endif
#ifdef __HAL_RCC_I2C2_CLK_ENABLE
case 1:
__HAL_RCC_I2C2_CLK_ENABLE();
break;
#endif
#ifdef __HAL_RCC_I2C3_CLK_ENABLE
case 2:
__HAL_RCC_I2C3_CLK_ENABLE();
break;
#endif
#ifdef __HAL_RCC_I2C4_CLK_ENABLE
case 3:
__HAL_RCC_I2C4_CLK_ENABLE();
break;
#endif
#ifdef __HAL_RCC_I2C5_CLK_ENABLE
case 4:
__HAL_RCC_I2C5_CLK_ENABLE();
break;
#endif
#ifdef __HAL_RCC_I2C6_CLK_ENABLE
case 5:
__HAL_RCC_I2C6_CLK_ENABLE();
break;
#endif
}
/*!< GPIO configuration */
/*!< Configure sEE_I2C pins: SCL */
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_MEDIUM;
GPIO_InitStructure.Alternate = GPIO_AF4_I2C1;
GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
GPIO_InitStructure.Pull = GPIO_PULLUP;
if(TwiStruct->TwiNr == 3 && TwiStruct->SclPort == IOB && TwiStruct->SclPin == 8)
GPIO_InitStructure.Alternate = GPIO_AF1_I2C4;
GPIO_InitStructure.Pin = 1 << TwiStruct->SclPin;
HAL_GPIO_Init(GET_GPIO_PORT_ADDR[TwiStruct->SclPort], &GPIO_InitStructure);
GPIO_InitStructure.Alternate = GPIO_AF4_I2C1;
if(TwiStruct->TwiNr == 3 && TwiStruct->SdaPort == IOB && TwiStruct->SdaPin == 7)
GPIO_InitStructure.Alternate = GPIO_AF11_I2C4;
else if(TwiStruct->TwiNr == 3 && TwiStruct->SdaPort == IOB && TwiStruct->SdaPin == 9)
GPIO_InitStructure.Alternate = GPIO_AF1_I2C4;
/*!< Configure sEE_I2C pins: SDA */
//GPIO_InitStructure.Mode = GPIO_OType_OD;
GPIO_InitStructure.Pin = 1 << TwiStruct->SdaPin;
HAL_GPIO_Init(GET_GPIO_PORT_ADDR[TwiStruct->SdaPort], &GPIO_InitStructure);
}
void pyb_i2c_init(I2C_HandleTypeDef *i2c) {
int i2c_unit;
const pin_obj_t *scl_pin;
const pin_obj_t *sda_pin;
if (0) {
#if defined(MICROPY_HW_I2C1_SCL)
} else if (i2c == &I2CHandle1) {
i2c_unit = 1;
scl_pin = MICROPY_HW_I2C1_SCL;
sda_pin = MICROPY_HW_I2C1_SDA;
__HAL_RCC_I2C1_CLK_ENABLE();
#endif
#if defined(MICROPY_HW_I2C2_SCL)
} else if (i2c == &I2CHandle2) {
i2c_unit = 2;
scl_pin = MICROPY_HW_I2C2_SCL;
sda_pin = MICROPY_HW_I2C2_SDA;
__HAL_RCC_I2C2_CLK_ENABLE();
#endif
#if defined(MICROPY_HW_I2C3_SCL)
} else if (i2c == &I2CHandle3) {
i2c_unit = 3;
scl_pin = MICROPY_HW_I2C3_SCL;
sda_pin = MICROPY_HW_I2C3_SDA;
__HAL_RCC_I2C3_CLK_ENABLE();
#endif
#if defined(MICROPY_HW_I2C4_SCL)
} else if (i2c == &I2CHandle4) {
i2c_unit = 4;
scl_pin = MICROPY_HW_I2C4_SCL;
sda_pin = MICROPY_HW_I2C4_SDA;
__HAL_RCC_I2C4_CLK_ENABLE();
#endif
} else {
// I2C does not exist for this board (shouldn't get here, should be checked by caller)
return;
}
// init the GPIO lines
uint32_t mode = MP_HAL_PIN_MODE_ALT_OPEN_DRAIN;
uint32_t pull = MP_HAL_PIN_PULL_NONE; // have external pull-up resistors on both lines
mp_hal_pin_config_alt(scl_pin, mode, pull, AF_FN_I2C, i2c_unit);
mp_hal_pin_config_alt(sda_pin, mode, pull, AF_FN_I2C, i2c_unit);
// init the I2C device
if (HAL_I2C_Init(i2c) != HAL_OK) {
// init error
// TODO should raise an exception, but this function is not necessarily going to be
// called via Python, so may not be properly wrapped in an NLR handler
printf("OSError: HAL_I2C_Init failed\n");
return;
}
// invalidate the DMA channels so they are initialised on first use
const pyb_i2c_obj_t *self = &pyb_i2c_obj[i2c_unit - 1];
dma_invalidate_channel(self->tx_dma_descr);
dma_invalidate_channel(self->rx_dma_descr);
if (0) {
#if defined(MICROPY_HW_I2C1_SCL)
} else if (i2c->Instance == I2C1) {
HAL_NVIC_EnableIRQ(I2C1_EV_IRQn);
HAL_NVIC_EnableIRQ(I2C1_ER_IRQn);
#endif
#if defined(MICROPY_HW_I2C2_SCL)
} else if (i2c->Instance == I2C2) {
HAL_NVIC_EnableIRQ(I2C2_EV_IRQn);
HAL_NVIC_EnableIRQ(I2C2_ER_IRQn);
#endif
#if defined(MICROPY_HW_I2C3_SCL)
} else if (i2c->Instance == I2C3) {
HAL_NVIC_EnableIRQ(I2C3_EV_IRQn);
HAL_NVIC_EnableIRQ(I2C3_ER_IRQn);
#endif
#if defined(MICROPY_HW_I2C4_SCL)
} else if (i2c->Instance == I2C4) {
HAL_NVIC_EnableIRQ(I2C4_EV_IRQn);
HAL_NVIC_EnableIRQ(I2C4_ER_IRQn);
#endif
}
}
