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68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
3 years ago
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#include "p_usart.h"
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#define DEBUG_USART_EX_BUFF_SIZE 16
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struct usart_async_descriptor p_usart_debug_inst;
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static uint8_t example_USART_0[12] = "Hello World!";
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static uint8_t debug_buffer[DEBUG_MAX_BUFFER_SIZE];
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static uint8_t debug_rx_buff[DEBUG_USART_EX_BUFF_SIZE];
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void p_usart_init(void)
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{
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// clock init
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hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM0_GCLK_ID_CORE, CONF_GCLK_SERCOM0_CORE_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
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hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM0_GCLK_ID_SLOW, CONF_GCLK_SERCOM0_SLOW_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
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hri_mclk_set_APBAMASK_SERCOM0_bit(MCLK);
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usart_async_init(&p_usart_debug_inst, USART_DEBUG_SERCOM, debug_rx_buff, DEBUG_USART_EX_BUFF_SIZE, (void*)NULL);
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// port init
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gpio_set_pin_function(USART_DEBUG_RX, USART_DEBUG_RX_MUX);
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gpio_set_pin_function(USART_DEBUG_TX, USART_DEBUG_TX_MUX);
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usart_async_enable(&p_usart_debug_inst);
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io_write(&p_usart_debug_inst.io, example_USART_0, 12);
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}
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void p_write(struct usart_async_descriptor* const inst, const uint8_t* data, uint16_t len)
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{
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}
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void p_debug(const char* str, ...)
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{
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}
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/**
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* Example of using USART_0 to write "Hello World" using the IO abstraction.
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*
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* Since the driver is asynchronous we need to use statically allocated memory for string
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* because driver initiates transfer and then returns before the transmission is completed.
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*
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* Once transfer has been completed the tx_cb function will be called.
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*/
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static void tx_cb_USART_0(const struct usart_async_descriptor *const io_descr)
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{
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/* Transfer completed */
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}
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//
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//void USART_0_example(void)
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//{
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//struct io_descriptor *io;
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//
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//usart_async_register_callback(&USART_0, USART_ASYNC_TXC_CB, tx_cb_USART_0);
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///*usart_async_register_callback(&USART_0, USART_ASYNC_RXC_CB, rx_cb);
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//usart_async_register_callback(&USART_0, USART_ASYNC_ERROR_CB, err_cb);*/
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//usart_async_get_io_descriptor(&USART_0, &io);
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//usart_async_enable(&USART_0);
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//
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//io_write(io, example_USART_0, 12);
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//}
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