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LpcUart:[#22] Added USART0 wrapper. (LpcDebugUart)

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* Refactored LpcUart for USART0, the handling is a bit different,
so it would have been painful to add that to LpcUart class.
* scanf() still doesn't work, but hey, we have debug prints now!
* Can't believe it actually worked.
This commit is contained in:
RedHawk
2023-05-06 12:37:25 +03:00
parent 13e392f37b
commit 01604edcfd
4 changed files with 297 additions and 16 deletions
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63
source/shoh/src/peripherals/LpcDebugUart.h Normal file
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/*
* LpcDebugUart.h
*
* Created on: 6.5.2023
*/
#ifndef LPCDEBUGUART_H_
#define LPCDEBUGUART_H_
#include "chip.h"
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
#include "Fmutex.h"
#include "LpcUart.h"
struct LpcDebugUartConfig {
LPC_USART0_T *pUART;
uint32_t speed;
uint32_t data;
LpcPinMap tx;
LpcPinMap rx;
};
class LpcDebugUart {
public:
LpcDebugUart(const LpcDebugUartConfig &cfg);
LpcDebugUart(const LpcDebugUart &) = delete;
virtual ~LpcDebugUart();
int free(); /* get amount of free space in transmit buffer */
int peek(); /* get number of received characters in receive buffer */
int write(char c);
int write(const char *s);
int write(const char *buffer, int len);
int read(char &c); /* get a single character. Returns number of characters read --> returns 0 if no character is available */
int read(char *buffer, int len);
int read(char *buffer, int len, TickType_t total_timeout, TickType_t ic_timeout = portMAX_DELAY);
void txbreak(bool brk); /* set break signal on */
bool rxbreak(); /* check if break is received */
void speed(int bps); /* change transmission speed */
bool txempty();
void set_on_receive(void(*cb)(void));
void isr(portBASE_TYPE *hpw); /* ISR handler. This will be called by the HW ISR handler. Do not call from application */
private:
LPC_USART0_T *uart;
IRQn_Type irqn;
/* currently we support only fixed size ring buffers */
static const int UART_RB_SIZE = 128;
/* Transmit and receive ring buffers */
RINGBUFF_T txring;
RINGBUFF_T rxring;
uint8_t rxbuff[UART_RB_SIZE];
uint8_t txbuff[UART_RB_SIZE];
TaskHandle_t notify_rx;
TaskHandle_t notify_tx;
void (*on_receive)(void); // callback for received data notifications
Fmutex read_mutex;
Fmutex write_mutex;
};
#endif /* LPCUART_H_ */