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stm32f3: be UART0 aware

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This commit is contained in:
Thomas Eichinger 2014-09-11 16:05:39 +02:00
parent aefa818338
commit fc3864756f
1 changed files with 22 additions and 2 deletions
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24
cpu/stm32f3/syscalls.c
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@ -37,28 +37,42 @@
#include "irq.h"
#include "periph/uart.h"
#ifdef MODULE_UART0
#include "board_uart0.h"
#endif
/**
* @brief manage the heap
*/
extern uint32_t _end; /* address of last used memory cell */
caddr_t heap_top = (caddr_t)&_end + 4;
#ifndef MODULE_UART0
/**
* @brief use mutex for waiting on incoming UART chars
*/
static mutex_t uart_rx_mutex;
static char rx_buf_mem[STDIO_BUFSIZE];
static ringbuffer_t rx_buf;
#endif
/**
* @brief Receive a new character from the UART and put it into the receive buffer
*/
void rx_cb(void *arg, char data)
{
#ifndef MODULE_UART0
(void)arg;
ringbuffer_add_one(&rx_buf, data);
mutex_unlock(&uart_rx_mutex);
#else
if (uart0_handler_pid) {
uart0_handle_incoming(data);
uart0_notify_thread();
}
#endif
}
/**
@ -66,10 +80,11 @@ void rx_cb(void *arg, char data)
*/
void _init(void)
{
#ifndef MODULE_UART0
mutex_init(&uart_rx_mutex);
ringbuffer_init(&rx_buf, rx_buf_mem, STDIO_BUFSIZE);
uart_init(STDIO, STDIO_BAUDRATE, rx_cb, 0, 0);
}
#endif
uart_init(STDIO, STDIO_BAUDRATE, rx_cb, 0, 0);}
/**
* @brief Free resources on NewLib de-initialization, not used for RIOT
@ -174,10 +189,15 @@ int _open_r(struct _reent *r, const char *name, int mode)
*/
int _read_r(struct _reent *r, int fd, void *buffer, unsigned int count)
{
#ifndef MODULE_UART0
while (rx_buf.avail == 0) {
mutex_lock(&uart_rx_mutex);
}
return ringbuffer_get(&rx_buf, (char*)buffer, rx_buf.avail);
#else
r->_errno = ENODEV;
return -1;
#endif
}
/**