a752c7ab
 elopes
add first test an...
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/*
* 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.
*
*/
/**
* @ingroup cpu_mips_pic32_common
* @ingroup drivers_periph_uart
* @{
*
* @file
* @brief Peripheral UART driver implementation
*
* @}
*/
#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;
}
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