/**
* \brief Test LIN transmit.
*
* This test initializes the LIN and start a transmit.
*
* \param test Current test case.
*/
static void run_lin_test(const struct test_case *test)
{
st_lin_message lin_desc;
/* Enable the peripheral clock in the PMC. */
pmc_enable_periph_clk(ID_USART0);
/* Enable LIN transceiver */
gpio_set_pin_high(PIN_USART0_CTS_IDX);
gpio_set_pin_high(PIN_USART0_RTS_IDX);
/* Node 0: LIN_MASTER_MODE */
lin_init(USART0, true, LIN_MASTER_NODE_NUM, 9600, sysclk_get_cpu_hz());
/* Configure lin_descriptor */
/* Init LIN data Node 0 */
/* Object 0 */
lin_desc.uc_id = LIN_FRAME_ID_12;
lin_desc.uc_dlc = sizeof(lin_data_node);
lin_desc.lin_cmd = PUBLISH;
lin_desc.uc_status = 0;
lin_desc.uc_pt_data = lin_data_node;
lin_register_descriptor(LIN_MASTER_NODE_NUM, 0, &lin_desc);
configure_tc();
/* In case of Master Mode, the timing transmission starts... */
tc_start(TC0, 0);
/* Configure and enable interrupt of USART */
NVIC_EnableIRQ(USART0_IRQn);
usart_enable_interrupt(USART0, US_IER_LINTC);
delay_ms(200);
test_assert_true(test, ul_LIN_int_flag, "LIN transmit failed!");
}
/**
* \brief Init Usart COM2 master.
*/
static void _init_com_master (void)
{
uint32_t id = get_usart_id_from_addr(lin_desc2.addr);
/* Configure Pios usart*/
pio_configure(&pins_com2[0], ARRAY_SIZE(pins_com2));
/* Init LIN MASTER data Node 0 */
lin_init(&lin_desc2, LIN_MASTER_NODE_NUM);
/* Configure interrupts */
usart_enable_it(lin_desc2.addr, US_IER_LINTC);
aic_set_source_vector(id, _com2_master_handler);
}
/**
* \brief Init Usart COM3 slave.
*/
static void _init_com_slave (void)
{
uint32_t id = get_usart_id_from_addr(lin_desc3.addr);
/* Configure Pios usart*/
pio_configure(&pins_com3[0], ARRAY_SIZE(pins_com3));
/* Init LIN SLAVE data Node 0 */
lin_init(&lin_desc3, LIN_SLAVE_NODE_NUM);
/* Configure interrupts */
usart_enable_it(lin_desc3.addr, US_IER_LINID);
aic_set_source_vector(id, _com3_slave_handler);
aic_enable(id);
}
/**
* \brief This is an example demonstrating the LIN mode of USART IP
* functionalities using a dedicated USART LIN driver.
*/
int main(void)
{
st_lin_message lin_desc;
uint8_t uc_key;
/* Initialize the SAM system. */
sysclk_init();
board_init();
/* Configure UART for debug message output. */
configure_console();
/* Output example information. */
puts(STRING_HEADER);
/* Enable the peripheral clock in the PMC. */
pmc_enable_periph_clk(ID_USART0);
/* Enable LIN transceiver */
gpio_set_pin_high(PIN_USART0_CTS_IDX);
gpio_set_pin_high(PIN_USART0_RTS_IDX);
display_menu();
while (true) {
while (uart_read(CONSOLE_UART, &uc_key)) {
}
switch (uc_key) {
case 'm':
case 'M':
puts("-- Set LIN to Master mode\n\r");
/* Node 0: LIN_MASTER_MODE */
lin_init(USART0, true, LIN_MASTER_NODE_NUM, 9600,
sysclk_get_cpu_hz());
/* Configure lin_descriptor */
/* Init LIN data Node 0 */
/* Object 0 */
lin_desc.uc_id = LIN_FRAME_ID_12;
lin_desc.uc_dlc = sizeof(lin_data_node);
lin_desc.lin_cmd = PUBLISH;
lin_desc.uc_status = 0;
lin_desc.uc_pt_data = lin_data_node;
lin_register_descriptor(LIN_MASTER_NODE_NUM, 0, &lin_desc);
configure_tc();
/* In case of Master Mode, the timing transmission starts. */
tc_start(TC0, 0);
break;
case 's':
case 'S':
puts("-- Set LIN to Slave mode\n\r");
/* Node 0: LIN_SLAVE_MODE */
lin_init(USART0, false, LIN_SLAVE_NODE_NUM, 9600,
sysclk_get_cpu_hz());
/* Configure lin_descriptor */
/* Init LIN data Node 0 */
/* Object 0 */
lin_desc.uc_id = LIN_FRAME_ID_12;
lin_desc.uc_dlc = sizeof(lin_data_node);
lin_desc.lin_cmd = SUBSCRIBE;
lin_desc.uc_status = 0;
lin_desc.uc_pt_data = lin_data_node;
lin_desc.pt_function = lin_slave_task_ID12;
lin_register_descriptor(LIN_SLAVE_NODE_NUM, 0, &lin_desc);
/* Configure and enable interrupt of USART. */
NVIC_EnableIRQ(USART0_IRQn);
usart_enable_interrupt(USART0, US_IER_LINID);
/* In case of Slave Mode, only wait for ID reception. */
break;
case 'h':
case 'H':
display_menu();
break;
}
puts("Press \'h\' or \'H\' to display the main menu again!!\r");
}
}
