uint8_t TM_USART_Getc(USART_TypeDef* USARTx) {
uint8_t usart_num = TM_USART_GetUsartNumber(USARTx);
uint8_t c = 0;
//Check if we have any data in buffer
if (tm_usart_buf_num[usart_num] > 0) {
if (tm_usart_buf_out[usart_num] > (TM_USART_BUFFER_SIZE - 1)) {
tm_usart_buf_out[usart_num] = 0;
}
c = TM_USART_Buffer[usart_num][tm_usart_buf_out[usart_num]];
TM_USART_Buffer[usart_num][tm_usart_buf_out[usart_num]] = 0;
tm_usart_buf_out[usart_num]++;
tm_usart_buf_num[usart_num]--;
}
return c;
}
uint8_t TM_USART_FindCharacter(USART_TypeDef* USARTx, volatile char c) {
uint16_t num, out;
uint8_t usart_num = TM_USART_GetUsartNumber(USARTx);
num = tm_usart_buf_num[usart_num];
out = tm_usart_buf_out[usart_num];
while (num > 0) {
if (out > (TM_USART_BUFFER_SIZE - 1)) {
out = 0;
}
if (TM_USART_Buffer[usart_num][out] == c) {
/* Character founc */
return 1;
}
out++;
num--;
}
/* Character is not in buffer */
return 0;
}
uint8_t TM_USART_BufferEmpty(USART_TypeDef* USARTx) {
uint8_t usart_num = TM_USART_GetUsartNumber(USARTx);
return !(tm_usart_buf_num[usart_num] > 0);
}
void TM_USART_Init(USART_TypeDef* USARTx, TM_USART_PinsPack_t pinspack, uint32_t baudrate) {
/**
* Initialization structures declared
*
* USART: Universal Synchronous/Asynchronous Receiver/Transmitter
* NVIC: Nested Vector Interrupt Controller
*/
USART_InitTypeDef USART_InitStruct;
NVIC_InitTypeDef NVIC_InitStruct;
/**
* Default settings:
*
* Set Baudrate to value you pass to function
* Disable Hardware Flow control
* Set Mode To TX and RX, so USART will work in full-duplex mode
* Disable parity bit
* Set 1 stop bit
* Set Data bits to 8
*/
USART_InitStruct.USART_BaudRate = baudrate;
/*
* Initialize USARTx pins
* Set channel for USARTx NVIC
*/
#ifdef USART1
if (USARTx == USART1) {
TM_USART1_InitPins(pinspack);
NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn;
USART_InitStruct.USART_HardwareFlowControl = TM_USART1_HARDWARE_FLOW_CONTROL;
USART_InitStruct.USART_Mode = TM_USART1_MODE;
USART_InitStruct.USART_Parity = TM_USART1_PARITY;
USART_InitStruct.USART_StopBits = TM_USART1_STOP_BITS;
USART_InitStruct.USART_WordLength = TM_USART1_WORD_LENGTH;
}
#endif
#ifdef USART2
if (USARTx == USART2) {
TM_USART2_InitPins(pinspack);
NVIC_InitStruct.NVIC_IRQChannel = USART2_IRQn;
USART_InitStruct.USART_HardwareFlowControl = TM_USART2_HARDWARE_FLOW_CONTROL;
USART_InitStruct.USART_Mode = TM_USART2_MODE;
USART_InitStruct.USART_Parity = TM_USART2_PARITY;
USART_InitStruct.USART_StopBits = TM_USART2_STOP_BITS;
USART_InitStruct.USART_WordLength = TM_USART2_WORD_LENGTH;
}
#endif
#ifdef USART3
if (USARTx == USART3) {
TM_USART3_InitPins(pinspack);
NVIC_InitStruct.NVIC_IRQChannel = USART3_IRQn;
USART_InitStruct.USART_HardwareFlowControl = TM_USART3_HARDWARE_FLOW_CONTROL;
USART_InitStruct.USART_Mode = TM_USART3_MODE;
USART_InitStruct.USART_Parity = TM_USART3_PARITY;
USART_InitStruct.USART_StopBits = TM_USART3_STOP_BITS;
USART_InitStruct.USART_WordLength = TM_USART3_WORD_LENGTH;
}
#endif
#ifdef UART4
if (USARTx == UART4) {
TM_UART4_InitPins(pinspack);
NVIC_InitStruct.NVIC_IRQChannel = UART4_IRQn;
USART_InitStruct.USART_HardwareFlowControl = TM_UART4_HARDWARE_FLOW_CONTROL;
USART_InitStruct.USART_Mode = TM_UART4_MODE;
USART_InitStruct.USART_Parity = TM_UART4_PARITY;
USART_InitStruct.USART_StopBits = TM_UART4_STOP_BITS;
USART_InitStruct.USART_WordLength = TM_UART4_WORD_LENGTH;
}
#endif
#ifdef UART5
if (USARTx == UART5) {
TM_UART5_InitPins(pinspack);
NVIC_InitStruct.NVIC_IRQChannel = UART5_IRQn;
USART_InitStruct.USART_HardwareFlowControl = TM_UART5_HARDWARE_FLOW_CONTROL;
USART_InitStruct.USART_Mode = TM_UART5_MODE;
USART_InitStruct.USART_Parity = TM_UART5_PARITY;
USART_InitStruct.USART_StopBits = TM_UART5_STOP_BITS;
USART_InitStruct.USART_WordLength = TM_UART5_WORD_LENGTH;
}
#endif
#ifdef USART6
if (USARTx == USART6) {
TM_USART6_InitPins(pinspack);
NVIC_InitStruct.NVIC_IRQChannel = USART6_IRQn;
USART_InitStruct.USART_HardwareFlowControl = TM_USART6_HARDWARE_FLOW_CONTROL;
USART_InitStruct.USART_Mode = TM_USART6_MODE;
USART_InitStruct.USART_Parity = TM_USART6_PARITY;
USART_InitStruct.USART_StopBits = TM_USART6_STOP_BITS;
USART_InitStruct.USART_WordLength = TM_USART6_WORD_LENGTH;
}
#endif
#ifdef UART7_IRQn
if (USARTx == UART7) {
TM_UART7_InitPins(pinspack);
NVIC_InitStruct.NVIC_IRQChannel = UART7_IRQn;
USART_InitStruct.USART_HardwareFlowControl = TM_UART7_HARDWARE_FLOW_CONTROL;
USART_InitStruct.USART_Mode = TM_UART7_MODE;
USART_InitStruct.USART_Parity = TM_UART7_PARITY;
USART_InitStruct.USART_StopBits = TM_UART7_STOP_BITS;
USART_InitStruct.USART_WordLength = TM_UART7_WORD_LENGTH;
}
#endif
#ifdef UART8_IRQn
if (USARTx == UART8) {
TM_UART8_InitPins(pinspack);
NVIC_InitStruct.NVIC_IRQChannel = UART8_IRQn;
USART_InitStruct.USART_HardwareFlowControl = TM_UART8_HARDWARE_FLOW_CONTROL;
USART_InitStruct.USART_Mode = TM_UART8_MODE;
USART_InitStruct.USART_Parity = TM_UART8_PARITY;
USART_InitStruct.USART_StopBits = TM_UART8_STOP_BITS;
USART_InitStruct.USART_WordLength = TM_UART8_WORD_LENGTH;
}
#endif
USART_Init(USARTx, &USART_InitStruct);
USART_Cmd(USARTx, ENABLE);
/**
* Enable RX interrupt
*/
USART_ITConfig(USARTx, USART_IT_RXNE, ENABLE);
/**
* Set Channel Cmd to enable. That will enable USARTx channel in NVIC
* Set NVIC_IRQChannelPreemptionPriority. This means high priority for USARTs
* USARTx with lower x has high subpriority
*
* Initialize NVIC
*/
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = TM_USART_NVIC_PRIORITY;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = TM_USART_GetUsartNumber(USARTx);
NVIC_Init(&NVIC_InitStruct);
}
void TM_USART_ClearBuffer(USART_TypeDef* USARTx) {
uint8_t usart_num = TM_USART_GetUsartNumber(USARTx);
tm_usart_buf_num[usart_num] = 0;
tm_usart_buf_in[usart_num] = 0;
tm_usart_buf_out[usart_num] = 0;
}