BV UART: add action command
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@ -268,8 +268,230 @@ static void busvoodoo_uart_exit(void)
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busvoodoo_embedded_pullup(false); // disable embedded pull-ups
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}
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/** write to UART
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* @param[in] value value to write
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*/
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static void busvoodoo_uart_write(uint16_t value)
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{
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while ((0==(USART_SR(USART(BUSVOODOO_USART_ID)) & USART_SR_TXE) && !user_input_available)); // wait for transmit buffer to be empty (or user to interrupt)
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if (USART_SR(USART(BUSVOODOO_USART_ID)) & USART_SR_TXE) { // we can send a character
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// remove unused bits
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if (USART_PARITY_NONE==busvoodoo_uart_parity) { // no parity bit in frame
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if (8==busvoodoo_uart_databits) { // 8-bit frame
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value &= 0xff;
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} else { // 9-bit frame
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value &= 0x1ff;
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}
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} else { // MSb is parity bit
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if (8==busvoodoo_uart_databits) { // 8-bit frame
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value &= 0x7f;
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} else { // 9-bit frame
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value &= 0xff;
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}
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}
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// send data
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busvoodoo_led_red_pulse(BUSVOODOO_LED_PULSE); // pulse red LED to show transmission
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usart_send(USART(BUSVOODOO_USART_ID), value); // transmit character
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// display data send
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printf("write: '%c'/0x", value);
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if ((USART_PARITY_NONE==busvoodoo_uart_parity) && 9==busvoodoo_uart_databits) { // case where the final data is 9 bits long
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printf("%03x\n", value);
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} else {
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printf("%02x\n", value);
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}
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}
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}
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/** read from UART
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*/
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static void busvoodoo_uart_read(void)
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{
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printf("read: ");
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while (!(USART_SR(USART(BUSVOODOO_USART_ID)) & USART_SR_RXNE) && !user_input_available); // wait for incoming data to be available (or user input to exit)
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if ((USART_SR(USART(BUSVOODOO_USART_ID)) & USART_SR_RXNE)) { // verify if data has been received
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busvoodoo_led_blue_pulse(BUSVOODOO_LED_PULSE); // enable blue LED to show reception
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// get the errors
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bool error_noise = (0!=(USART_SR(USART(BUSVOODOO_USART_ID)) & USART_SR_NE)); // read noise error flag
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bool error_framing = (0!=(USART_SR(USART(BUSVOODOO_USART_ID)) & USART_SR_FE)); // read frame error flag
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bool error_parity = (0!=(USART_SR(USART(BUSVOODOO_USART_ID)) & USART_SR_PE)); // read parity error flag
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uint16_t c = usart_recv(USART(BUSVOODOO_USART_ID)); // read received character (also clears the error flags)
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// remove unused bits
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if (USART_PARITY_NONE==busvoodoo_uart_parity) { // no parity bit in frame
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if (8==busvoodoo_uart_databits) { // 8-bit frame
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c &= 0xff;
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} else { // 9-bit frame
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c &= 0x1ff;
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}
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} else { // MSb is parity bit
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if (8==busvoodoo_uart_databits) { // 8-bit frame
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c &= 0x7f;
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} else { // 9-bit frame
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c &= 0xff;
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}
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}
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// display data
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printf("'%c'/0x", c);
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if ((USART_PARITY_NONE==busvoodoo_uart_parity) && 9==busvoodoo_uart_databits) { // case where the final data is 9 bits long
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printf("%03x ", c);
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} else {
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printf("%02x ", c);
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}
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// display errors
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printf("(");
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if (error_noise) {
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printf("noise");
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} else if (error_framing) {
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printf("framing");
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} else if (error_parity) {
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printf("parity");
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} else {
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printf("no");
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}
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printf(" error)");
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}
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printf("\n");
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}
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/** perform UART action
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* @param[in] action action to perform
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* @param[in] repetition how many times to perform the action
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* @param[in] perform the action (true) or just check it (false)
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* @return true if the action has been performed, false if it is malformed
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*/
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static bool busvoodoo_uart_action(const char* action, uint32_t repetition, bool perform)
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{
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uint32_t length = strlen(action); // remember length since it will be used a number of times
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if (NULL==action || 0==length) { // there is nothing to do
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return true;
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}
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if (1==length && 'r'==action[0]) { // read data
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if (!perform) {
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return true;
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}
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for (uint32_t i=0; i<repetition; i++) {
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busvoodoo_uart_read(); // read from UART
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}
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} else if (1==length && 'u'==action[0]) { // sleep us
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if (!perform) {
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return true;
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}
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printf("wait for %u us\n", repetition);
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sleep_us(repetition); // sleep
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} else if (1==length && 'm'==action[0]) { // sleep ms
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if (!perform) {
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return true;
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}
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printf("wait for %u ms\n", repetition);
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sleep_ms(repetition); // sleep
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} else if ('0'==action[0]) { // send digit
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if (1==length) { // just send 0
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if (!perform) {
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return true;
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}
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for (uint32_t i=0; i<repetition; i++) {
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busvoodoo_uart_write(0); // write to UART
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}
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} else if ('x'==action[1] || 'b'==action[1]) { // send hex/binary
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return busvoodoo_uart_action(action+1, repetition, perform); // just retry without leading 0
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} else if (action[1]>='0' && action[1]<='9') { // send decimal
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return busvoodoo_uart_action(action+1, repetition, perform); // just retry without leading 0
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} else { // malformed action
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return false;
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}
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} else if ('x'==action[0] && length>1) { // send hexadecimal value
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for (uint32_t i=1; i<length; i++) { // check string
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if (!((action[i]>='0' && action[i]<='9') || (action[i]>='a' && action[i]<='f') || (action[i]>='A' && action[i]<='F'))) { // check for hexadecimal character
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return false; // not an hexadecimal string
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}
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}
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if (!perform) {
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return true;
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}
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uint32_t value = strtol(&action[1], NULL, 16); // get hex value
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for (uint32_t i=0; i<repetition; i++) {
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busvoodoo_uart_write(value); // write to SPI
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}
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} else if ('b'==action[0] && length>1) { // send binary value
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for (uint32_t i=1; i<length; i++) { // check string
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if (action[i]<'0' || action[i]>'1') { // check for binary character
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return false; // not a binary string
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}
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}
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if (!perform) {
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return true;
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}
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uint32_t value = strtol(&action[1], NULL, 2); // get binary value
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for (uint32_t i=0; i<repetition; i++) {
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busvoodoo_uart_write(value); // write to SPI
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}
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} else if (action[0]>='1' && action[0]<='9') { // send decimal value
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for (uint32_t i=1; i<length; i++) { // check string
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if (action[i]<'0' || action[i]>'9') { // check for decimal character
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return false; // not a decimal string
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}
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}
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if (!perform) {
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return true;
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}
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uint32_t value = strtol(&action[0], NULL, 10); // get decimal value
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for (uint32_t i=0; i<repetition; i++) {
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busvoodoo_uart_write(value); // write to SPI
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}
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} else if (length>=2 && ('"'==action[0] || '\''==action[0]) && (action[length-1]==action[0])) { // send ASCII character
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if (!perform) {
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return true;
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}
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for (uint32_t r=0; r<repetition; r++) {
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for (uint32_t i=1; i<length-1; i++) { // go through string
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busvoodoo_uart_write(action[i]); // write to SPI
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}
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}
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} else { // malformed action
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return false;
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}
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return true; // all went well
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}
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// command handlers
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/** command to perform actions
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* @param[in] argument actions to perform
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*/
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static void busvoodoo_uart_command_actions(void* argument)
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{
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if (NULL==argument || 0==strlen(argument)) {
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printf("available actions (separated by space or ,):\n");
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printf("0\twrite decimal value\n");
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printf("0x0\twrite hexadecimal value\n");
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printf("0b0\twrite binary value\n");
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printf("\"a\"/'a'\twrite ASCII characters\n");
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printf("r\tread value\n");
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printf("u/m\twait 1 us/ms\n");
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printf(":n\trepeat action n times\n");
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return;
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}
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// copy argument since it will be modified
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char* copy = calloc(strlen(argument)+1, sizeof(char));
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if (!copy) {
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while (true);
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}
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strncpy(copy, argument, strlen(argument)+1);
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// verify and perform actions
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if (!busvoodoo_global_actions(copy, false, &busvoodoo_uart_action)) { // verify actions
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printf("malformed action(s)\n");
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} else { // action are ok
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printf("press any key to exit\n");
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busvoodoo_global_actions(argument, true, &busvoodoo_uart_action); // perform action
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if (user_input_available) { // user interrupted flow
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user_input_get(); // discard user input
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}
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}
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free(copy); // release memory
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}
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/** command to transmit a string
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* @param[in] argument string to transmit (CR+LF when none provided)
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*/
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@ -400,6 +622,14 @@ static void busvoodoo_uart_command_transceive(void* argument)
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/** UART menu commands */
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static const struct menu_command_t busvoodoo_uart_commands[] = {
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{
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'a',
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"action",
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"perform protocol actions",
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MENU_ARGUMENT_STRING,
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"[actions]",
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&busvoodoo_uart_command_actions,
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},
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{
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'r',
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"receive",
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