88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
/**
|
|
******************************************************************************
|
|
* @file SHAL_TIM.h
|
|
* @author Luca Lizaranzu
|
|
* @brief Related to USART and SHAL_UART abstractions
|
|
******************************************************************************
|
|
*/
|
|
|
|
|
|
#include "SHAL_UART.h"
|
|
#include "SHAL_GPIO.h"
|
|
|
|
void SHAL_UART::init(UART_Pair_Key pair){
|
|
|
|
m_key = pair;
|
|
|
|
SHAL_UART_Pair uart_pair = getUARTPair(pair); //Get the UART_PAIR information to be initialized
|
|
|
|
//Get the SHAL_GPIO pins for this SHAL_UART setup
|
|
GPIO_Key Tx_Key = uart_pair.TxKey; //Tx pin
|
|
GPIO_Key Rx_Key = uart_pair.RxKey; //Rx pin
|
|
|
|
GET_GPIO(Tx_Key).setPinMode(PinMode::ALTERNATE_FUNCTION_MODE);
|
|
GET_GPIO(Rx_Key).setPinMode(PinMode::ALTERNATE_FUNCTION_MODE);
|
|
|
|
GET_GPIO(Tx_Key).setAlternateFunction(uart_pair.TxAlternateFunctionMask);
|
|
GET_GPIO(Rx_Key).setAlternateFunction(uart_pair.RxAlternateFunctionMask);
|
|
|
|
SHAL_UART_Enable_Register pairUARTEnable = getUARTEnableReg(pair); //Register and mask to enable the SHAL_UART channel
|
|
|
|
*pairUARTEnable.reg |= pairUARTEnable.mask; //Enable SHAL_UART line
|
|
|
|
|
|
}
|
|
|
|
void SHAL_UART::begin(uint32_t baudRate) volatile {
|
|
|
|
USART_TypeDef* usart = getUARTPair(m_key).USARTReg;
|
|
|
|
auto control_reg = getUARTControlRegister1(m_key);
|
|
|
|
SHAL_clear_bitmask(control_reg.reg, control_reg.usart_enable_mask); //Clear enable bit (turn off usart)
|
|
|
|
usart->CR1 = 0; //Clear USART config
|
|
|
|
SHAL_apply_bitmask(control_reg.reg, control_reg.transmit_enable_mask); //Enable Tx
|
|
SHAL_apply_bitmask(control_reg.reg, control_reg.receive_enable_mask); //Enable Rx
|
|
|
|
auto baud_rate_reg = getUARTBaudRateGenerationRegister(m_key);
|
|
|
|
uint32_t adjustedBaudRate = SystemCoreClock / baudRate;
|
|
|
|
SHAL_set_register_value(baud_rate_reg.reg,adjustedBaudRate);
|
|
|
|
SHAL_apply_bitmask(control_reg.reg, control_reg.usart_enable_mask); //Turn on usart
|
|
}
|
|
|
|
void SHAL_UART::sendString(const char *s) volatile {
|
|
while (*s) {//Send chars while we haven't reached end of s
|
|
sendChar(*s++);
|
|
}
|
|
}
|
|
|
|
void SHAL_UART::sendChar(char c) volatile {
|
|
|
|
auto ISR_non_fifo = getUARTISRFifoDisabled(m_key);
|
|
|
|
if(!SHAL_WAIT_FOR_CONDITION_MS((*ISR_non_fifo.reg & ISR_non_fifo.transmit_data_register_empty_mask) != 0, 500)){
|
|
PIN(B3).setHigh();
|
|
return;
|
|
}
|
|
|
|
auto transmit_reg = getUARTTransmitDataRegister(m_key);
|
|
SHAL_set_register_value_16(transmit_reg.reg, static_cast<uint16_t>(c));
|
|
}
|
|
|
|
|
|
|
|
SHAL_UART& UARTManager::get(uint8_t uart) {
|
|
|
|
if(uart > NUM_USART_LINES - 1){
|
|
assert(false);
|
|
//Memory fault
|
|
}
|
|
|
|
return m_UARTs[uart];
|
|
}
|