mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
|
/*
|
||
|
|
* Copyright(C) 2016,2017 Imagination Technologies Limited and/or its
|
||
|
|
* affiliated group companies.
|
||
|
|
*
|
||
|
|
* This file is subject to the terms and conditions of the GNU Lesser
|
||
|
|
* General Public License v2.1. See the file LICENSE in the top level
|
||
|
|
* directory for more details.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
#include <assert.h>
|
||
|
|
#include "periph/uart.h"
|
||
|
|
#include "board.h"
|
||
|
|
|
||
|
|
#define UxMODE(U) (U.regs[0x00/4])
|
||
|
|
#define UxMODECLR(U) (U.regs[0x04/4])
|
||
|
|
#define UxMODESET(U) (U.regs[0x08/4])
|
||
|
|
#define UxSTA(U) (U.regs[0x10/4])
|
||
|
|
#define UxSTACLR(U) (U.regs[0x14/4])
|
||
|
|
#define UxSTASET(U) (U.regs[0x18/4])
|
||
|
|
#define UxTXREG(U) (U.regs[0x20/4])
|
||
|
|
#define UxRXREG(U) (U.regs[0x30/4])
|
||
|
|
#define UxBRG(U) (U.regs[0x40/4])
|
||
|
|
#define REGS_SPACING (_UART2_BASE_ADDRESS - _UART1_BASE_ADDRESS)
|
||
|
|
|
||
|
|
/* PERIPHERAL_CLOCK must be defined in board file */
|
||
|
|
|
||
|
|
typedef struct PIC32_UART_tag {
|
||
|
|
volatile uint32_t *regs;
|
||
|
|
uint32_t clock;
|
||
|
|
} PIC32_UART_T;
|
||
|
|
|
||
|
|
/* pic uarts are numbered 1 to 6 */
|
||
|
|
static PIC32_UART_T pic_uart[UART_NUMOF + 1];
|
||
|
|
|
||
|
|
int uart_init(uart_t uart, uint32_t baudrate, uart_rx_cb_t rx_cb, void *arg)
|
||
|
|
{
|
||
|
|
assert(uart <= UART_NUMOF && uart != 0); /*No uart 0 on pic32*/
|
||
|
|
|
||
|
|
/* Pin Mux should be setup in board file */
|
||
|
|
|
||
|
|
pic_uart[uart].regs =
|
||
|
|
(volatile uint32_t *)(_UART1_BASE_ADDRESS + (uart - 1) * REGS_SPACING);
|
||
|
|
pic_uart[uart].clock = PERIPHERAL_CLOCK;
|
||
|
|
|
||
|
|
UxBRG(pic_uart[uart])= (pic_uart[uart].clock / (16 * baudrate)) - 1;
|
||
|
|
UxSTA(pic_uart[uart])= 0;
|
||
|
|
UxMODE(pic_uart[uart])= _U1MODE_ON_MASK;
|
||
|
|
UxSTASET(pic_uart[uart])= _U1STA_URXEN_MASK;
|
||
|
|
UxSTASET(pic_uart[uart])= _U1STA_UTXEN_MASK;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void uart_write(uart_t uart, const uint8_t *data, size_t len)
|
||
|
|
{
|
||
|
|
assert(uart <= UART_NUMOF && uart != 0);
|
||
|
|
|
||
|
|
while(len--) {
|
||
|
|
while(UxSTA(pic_uart[uart])& _U1STA_UTXBF_MASK) {}
|
||
|
|
UxTXREG(pic_uart[uart]) = *data++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void uart_poweron(uart_t uart)
|
||
|
|
{
|
||
|
|
assert(uart <= UART_NUMOF && uart != 0);
|
||
|
|
|
||
|
|
UxMODESET(pic_uart[uart])= _U1MODE_ON_MASK;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
void uart_poweroff(uart_t uart)
|
||
|
|
{
|
||
|
|
assert(uart <= UART_NUMOF && uart != 0);
|
||
|
|
|
||
|
|
UxMODECLR(pic_uart[uart])= _U1MODE_ON_MASK;
|
||
|
|
}
|