BV SPI: add action handler
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2ec1d22a99
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fed8637079
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@ -59,7 +59,7 @@ static bool busvoodoo_spi_duplex = true;
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static uint8_t busvoodoo_spi_baudrate = 1;
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/** SPI data frame bit width (8 or 16) */
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static uint8_t busvoodoo_spi_databits = 8;
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/** SPI data frame bit order (true = MSB, false = LSB) */
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/** SPI data frame bit order (true = MSb first, false = LSb first) */
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static bool busvoodoo_spi_bitorder = true;
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/** SPI mode (defining clock polarity and phase) */
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static uint8_t busvoodoo_spi_standard_mode = 0;
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@ -170,7 +170,7 @@ static bool busvoodoo_spi_setup(char** prefix, const char* line)
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if (BUSVOODOO_SPI_SETTING_DRIVE==busvoodoo_spi_setting) { // if next setting
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printf("1) push-pull (3.3V)\n");
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printf("2) open-drain, with embedded pull-up (2kO)\n");
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printf("2) open-drain, with external pull-up\n");
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printf("3) open-drain, with external pull-up\n");
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snprintf(busvoodoo_global_string, LENGTH(busvoodoo_global_string), "drive mode (1,2,3) [%c]", busvoodoo_spi_drive ? '1' : (busvoodoo_spi_pullup ? '2' : '3')); // show drive mode
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*prefix = busvoodoo_global_string; // display next setting
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}
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@ -215,20 +215,21 @@ static bool busvoodoo_spi_setup(char** prefix, const char* line)
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spi_set_full_duplex_mode(SPI(BUSVOODOO_SPI_ID)); // set full duplex mode
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rcc_periph_clock_enable(RCC_SPI_MISO_PORT(BUSVOODOO_SPI_ID)); // enable clock for GPIO peripheral for MISO signal
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if (busvoodoo_spi_drive) {
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gpio_set_mode(SPI_MISO_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, SPI_MISO_PIN(BUSVOODOO_SPI_ID)); // set MISO as output
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gpio_set_mode(SPI_MISO_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, SPI_MISO_PIN(BUSVOODOO_SPI_ID)); // set MISO as input
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} else {
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gpio_set_mode(SPI_MISO_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, SPI_MISO_PIN(BUSVOODOO_SPI_ID)); // set MISO as output
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gpio_set_mode(SPI_MISO_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, SPI_MISO_PIN(BUSVOODOO_SPI_ID)); // set MISO as input
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}
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} else {
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spi_set_bidirectional_mode(SPI(BUSVOODOO_SPI_ID)); // set bidirectional mode
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}
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rcc_periph_clock_enable(RCC_SPI_SCK_PORT(BUSVOODOO_SPI_ID)); // enable clock for GPIO peripheral for SCK signal
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if (busvoodoo_spi_drive) {
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gpio_set_mode(SPI_SCK_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, SPI_SCK_PIN(BUSVOODOO_SPI_ID)); // set NSS as output
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gpio_set_mode(SPI_SCK_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, SPI_SCK_PIN(BUSVOODOO_SPI_ID)); // set SCK as output
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} else {
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gpio_set_mode(SPI_NSS_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, SPI_NSS_PIN(BUSVOODOO_SPI_ID)); // set NSS as output
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gpio_set_mode(SPI_SCK_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, SPI_SCK_PIN(BUSVOODOO_SPI_ID)); // set SCK as output
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}
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spi_enable_software_slave_management(SPI(BUSVOODOO_SPI_ID)); // control SS by software
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spi_set_nss_high(SPI(BUSVOODOO_SPI_ID)); // set NSS high (internally) so we can output
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rcc_periph_clock_enable(RCC_SPI_NSS_PORT(BUSVOODOO_SPI_ID)); // enable clock for GPIO peripheral for SS signal
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gpio_set(SPI_NSS_PORT(BUSVOODOO_SPI_ID), SPI_NSS_PIN(BUSVOODOO_SPI_ID)); // de-select slave (on high)
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if (busvoodoo_spi_drive) {
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@ -265,7 +266,55 @@ static bool busvoodoo_spi_setup(char** prefix, const char* line)
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return complete;
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}
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/** exit UART mode
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/** write to SPI
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* @param[in] value value to write
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*/
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static void busvoodoo_spi_write(uint16_t value)
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{
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if (8==busvoodoo_spi_databits) {
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printf("write: 0x%02x\n", (uint8_t)value);
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} else {
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printf("write: 0x%04x\n", value);
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}
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while (!(SPI_SR(SPI(BUSVOODOO_SPI_ID))&SPI_SR_TXE)); // wait until Tx is empty
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(void)SPI_DR(SPI(BUSVOODOO_SPI_ID)); // clear RXNE flag by reading previously received data
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spi_send(SPI(BUSVOODOO_SPI_ID), value); // send data
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if (busvoodoo_spi_duplex) {
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value = spi_read(SPI(BUSVOODOO_SPI_ID)); // read data
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if (8==busvoodoo_spi_databits) {
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printf("read: 0x%02x\n", (uint8_t)value);
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} else {
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printf("read: 0x%04x\n", value);
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}
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}
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}
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/** read from SPI
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*/
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static void busvoodoo_spi_read(void)
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{
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if (busvoodoo_spi_duplex) { // in full duplex mode
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busvoodoo_spi_write(0xffff); // send any value in order to read
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} else { // unidirectional mode
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gpio_set_mode(SPI_MOSI_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, SPI_MOSI_PIN(BUSVOODOO_SPI_ID)); // set MOSI as input
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while (!(SPI_SR(SPI(BUSVOODOO_SPI_ID))&SPI_SR_TXE)); // wait until Tx is empty
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(void)SPI_DR(SPI(BUSVOODOO_SPI_ID)); // clear RXNE flag by reading previously received data
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spi_send(SPI(BUSVOODOO_SPI_ID), 0xffff); // send any value
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uint16_t value = spi_read(SPI(BUSVOODOO_SPI_ID)); // read data back
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if (8==busvoodoo_spi_databits) {
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printf("read: 0x%02x\n", (uint8_t)value);
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} else {
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printf("read: 0x%04x\n", value);
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}
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if (busvoodoo_spi_drive) {
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gpio_set_mode(SPI_MOSI_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, SPI_MOSI_PIN(BUSVOODOO_SPI_ID)); // set MOSI as output
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} else {
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gpio_set_mode(SPI_MOSI_PORT(BUSVOODOO_SPI_ID), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, SPI_MOSI_PIN(BUSVOODOO_SPI_ID)); // set MOSI as output
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}
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}
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}
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/** exit SPI mode
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*/
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static void busvoodoo_spi_exit(void)
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{
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@ -279,6 +328,121 @@ static void busvoodoo_spi_exit(void)
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busvoodoo_embedded_pullup(false); // disable embedded pull-ups
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}
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/** perform SPI 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_spi_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_spi_read(); // write from SPI
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}
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} else if (1==length && '['==action[0]) { // select slave
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if (!perform) {
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return true;
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}
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printf("select slave\n");
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while (SPI_SR(SPI(BUSVOODOO_SPI_ID))&SPI_SR_BSY); // wait until not busy
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gpio_clear(SPI_NSS_PORT(BUSVOODOO_SPI_ID), SPI_NSS_PIN(BUSVOODOO_SPI_ID)); // select slave (on low)
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} else if (1==length && ']'==action[0]) { // deselect slave
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if (!perform) {
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return true;
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}
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printf("de-select slave\n");
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while (SPI_SR(SPI(BUSVOODOO_SPI_ID))&SPI_SR_BSY); // wait until not busy
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gpio_set(SPI_NSS_PORT(BUSVOODOO_SPI_ID), SPI_NSS_PIN(BUSVOODOO_SPI_ID)); // de-select slave (on high)
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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_spi_write(0); // write to SPI
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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_spi_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_spi_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_spi_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_spi_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_spi_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_spi_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 transmit and receive data
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@ -286,16 +450,40 @@ static void busvoodoo_spi_exit(void)
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*/
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static void busvoodoo_spi_command_transceive(void* argument)
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{
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(void)argument; // we won't use the argument
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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("[/]\tselect/deselect slave\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_spi_action)) { // verify actions
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printf("malformed action(s)\n");
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} else { // action are ok
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busvoodoo_global_actions(argument, true, &busvoodoo_spi_action); // perform action
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}
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free(copy); // release memory
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}
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static const struct menu_command_t busvoodoo_spi_commands[] = {
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{
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'x',
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"transceive",
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"transmit and receive data",
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MENU_ARGUMENT_NONE,
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NULL,
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'a',
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"action",
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"run protocol action",
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MENU_ARGUMENT_STRING,
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"[actions]",
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&busvoodoo_spi_command_transceive,
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},
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};
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