void platformInitHardware() {
//Low level init: Clock and Interrupt controller
nvicInit();
//EXTI interrupts
extiInit();
}
/* Initialisation */
void nrfInit(void)
{
SPI_InitTypeDef SPI_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
if (isInit==TRUE)
return;
/* Enable the EXTI interrupt router */
extiInit();
/* Enable SPI and GPIO clocks */
RCC_APB2PeriphClockCmd(RADIO_SPI_CLK | RADIO_GPIO_SPI_CLK | RADIO_GPIO_CS_PERIF |
RADIO_GPIO_CE_PERIF | RADIO_GPIO_IRQ_PERIF, ENABLE);
PWR_BackupAccessCmd(ENABLE);
RCC_LSEConfig(RCC_LSE_OFF);
BKP_TamperPinCmd(DISABLE);
PWR_BackupAccessCmd(DISABLE);
/* Configure SPI pins: SCK, MISO and MOSI */
GPIO_InitStructure.GPIO_Pin = RADIO_GPIO_SPI_SCK | RADIO_GPIO_SPI_MOSI | RADIO_GPIO_SPI_MISO;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(RADIO_GPIO_SPI_PORT, &GPIO_InitStructure);
/* Configure I/O for the Chip select */
GPIO_InitStructure.GPIO_Pin = RADIO_GPIO_CS;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(RADIO_GPIO_CS_PORT, &GPIO_InitStructure);
/* Configure the interruption (EXTI Source) */
GPIO_InitStructure.GPIO_Pin = RADIO_GPIO_IRQ;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(RADIO_GPIO_IRQ_PORT, &GPIO_InitStructure);
GPIO_EXTILineConfig(RADIO_GPIO_IRQ_SRC_PORT, RADIO_GPIO_IRQ_SRC);
EXTI_InitStructure.EXTI_Line = RADIO_GPIO_IRQ_LINE;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* disable the chip select */
RADIO_DIS_CS();
/* Configure I/O for the Chip Enable */
GPIO_InitStructure.GPIO_Pin = RADIO_GPIO_CE;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(RADIO_GPIO_CE_PORT, &GPIO_InitStructure);
/* disable the chip enable */
RADIO_DIS_CE();
/* SPI configuration */
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(RADIO_SPI, &SPI_InitStructure);
/* Enable the SPI */
SPI_Cmd(RADIO_SPI, ENABLE);
isInit = TRUE;
}
