1 /*!
2 * \file uart-board.c
3 *
4 * \brief Target board UART driver implementation
5 *
6 * \copyright Revised BSD License, see section \ref LICENSE.
7 *
8 * \code
9 * ______ _
10 * / _____) _ | |
11 * ( (____ _____ ____ _| |_ _____ ____| |__
12 * \____ \| ___ | (_ _) ___ |/ ___) _ \
13 * _____) ) ____| | | || |_| ____( (___| | | |
14 * (______/|_____)_|_|_| \__)_____)\____)_| |_|
15 * (C)2013-2017 Semtech
16 *
17 * \endcode
18 *
19 * \author Miguel Luis ( Semtech )
20 *
21 * \author Gregory Cristian ( Semtech )
22 *
23 * \author Marten Lootsma(TWTG) on behalf of Microchip/Atmel (c)2017
24 */
25 #include <peripheral_clk_config.h>
26 #include <hal_gpio.h>
27 #include <hal_usart_sync.h>
28
29 #include "board.h"
30 #include "uart-board.h"
31
32 struct usart_sync_descriptor Usart0;
33
UartMcuInit(Uart_t * obj,uint8_t uartId,PinNames tx,PinNames rx)34 void UartMcuInit( Uart_t *obj, uint8_t uartId, PinNames tx, PinNames rx )
35 {
36 obj->UartId = uartId;
37
38 // Clock initialization
39 hri_gclk_write_PCHCTRL_reg( GCLK, SERCOM0_GCLK_ID_CORE, CONF_GCLK_SERCOM0_CORE_SRC | ( 1 << GCLK_PCHCTRL_CHEN_Pos ) );
40 hri_gclk_write_PCHCTRL_reg( GCLK, SERCOM0_GCLK_ID_SLOW, CONF_GCLK_SERCOM0_SLOW_SRC | ( 1 << GCLK_PCHCTRL_CHEN_Pos ) );
41 hri_mclk_set_APBCMASK_SERCOM0_bit( MCLK );
42
43 // USART initialization
44 usart_sync_init( &Usart0, SERCOM0, ( void * )NULL );
45
46 // UASRT GPIO initialization
47 gpio_set_pin_function( tx, PINMUX_PA04D_SERCOM0_PAD0 );
48 gpio_set_pin_function( rx, PINMUX_PA05D_SERCOM0_PAD1 );
49
50 usart_sync_enable( &Usart0 );
51 }
52
UartMcuConfig(Uart_t * obj,UartMode_t mode,uint32_t baudrate,WordLength_t wordLength,StopBits_t stopBits,Parity_t parity,FlowCtrl_t flowCtrl)53 void UartMcuConfig( Uart_t *obj, UartMode_t mode, uint32_t baudrate, WordLength_t wordLength, StopBits_t stopBits, Parity_t parity, FlowCtrl_t flowCtrl )
54 {
55 usart_sync_set_baud_rate( &Usart0, baudrate );
56 }
57
UartMcuDeInit(Uart_t * obj)58 void UartMcuDeInit( Uart_t *obj )
59 {
60
61 }
62
UartMcuPutChar(Uart_t * obj,uint8_t data)63 uint8_t UartMcuPutChar( Uart_t *obj, uint8_t data )
64 {
65 if( io_write( &Usart0.io, &data, 1 ) == 0 )
66 {
67 return 1; // Busy
68 }
69 return 0; // OK
70 }
71
UartMcuGetChar(Uart_t * obj,uint8_t * data)72 uint8_t UartMcuGetChar( Uart_t *obj, uint8_t *data )
73 {
74 if( io_read( &Usart0.io, data, 1 ) == 1 )
75 {
76 return 0; // OK
77 }
78 else
79 {
80 return 1; // Busy
81 }
82 }
83
UartMcuPutBuffer(Uart_t * obj,uint8_t * buffer,uint16_t size)84 uint8_t UartMcuPutBuffer( Uart_t *obj, uint8_t *buffer, uint16_t size )
85 {
86 if( io_write( &Usart0.io, buffer, size ) == 0 )
87 {
88 return 1; //Error
89 }
90 return 0; // OK
91 }
92
UartMcuGetBuffer(Uart_t * obj,uint8_t * buffer,uint16_t size,uint16_t * nbReadBytes)93 uint8_t UartMcuGetBuffer( Uart_t *obj, uint8_t *buffer, uint16_t size, uint16_t *nbReadBytes )
94 {
95 *nbReadBytes = io_read( &Usart0.io, buffer, size );
96 if( *nbReadBytes == 0 )
97 {
98 return 1; // Empty
99 }
100 return 0; // OK
101 }
102
