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#define BAUD_RATE 19200
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#define BAUD_RATE 19200
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/**@}*/
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/**@}*/
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/**********************************************************************//**
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/**********************************************************************//**
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* Main function, shows an incrementing 8-bit timer on GPIO.output(7:0).
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* Main function; shows an incrementing 8-bit counter on GPIO.output(7:0).
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*
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*
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* @note This program requires the GPIO to be synthesized (the UART is optional).
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* @note This program requires the GPIO controller to be synthesized (the UART is optional).
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*
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*
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* @return Irrelevant.
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* @return Irrelevant.
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**************************************************************************/
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**************************************************************************/
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int main() {
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int main() {
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// init UART at default baud rate, no rx interrupt, no tx interrupt
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neorv32_uart_setup(BAUD_RATE, 0, 0);
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// check if GPIO unit is implemented at all
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// check if GPIO unit is implemented at all
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if (neorv32_gpio_available() == 0) {
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if (neorv32_gpio_available() == 0) {
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return 0; // nope, no GPIO unit synthesized :(
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neorv32_uart_print("Error! No GPIO unit synthesized!\n");
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return 0; // nope, no GPIO unit synthesized
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}
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}
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// capture all exceptions and give debug info via UART
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// capture all exceptions and give debug info via UART
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// this is not required, but keeps us safe
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// this is not required, but keeps us safe
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neorv32_rte_setup();
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neorv32_rte_setup();
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// init UART at default baud rate, no rx interrupt, no tx interrupt
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neorv32_uart_setup(BAUD_RATE, 0, 0);
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// say hello
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// say hello
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neorv32_uart_print("Blinking LED demo program\n");
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neorv32_uart_print("Blinking LED demo program\n");
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neorv32_gpio_port_set(0); // clear gpio output put
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neorv32_gpio_port_set(0); // clear gpio output put
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int cnt = 0;
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int cnt = 0;
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while (1) {
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while (1) {
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neorv32_gpio_port_set(cnt & 0xFF); // mask for lowest 8 bit
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neorv32_gpio_port_set(cnt++ & 0xFF); // increment counter and mask for lowest 8 bit
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neorv32_cpu_delay_ms(200); // wait 0.2s using busy wait
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neorv32_cpu_delay_ms(200); // wait 200ms using busy wait
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cnt++; // increment counter
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}
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}
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return 0;
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return 0;
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}
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}
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No newline at end of file
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No newline at end of file
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