cpol example

spi/CMakeLists.txt

@@ -6,6 +6,7 @@ if (TARGET hardware_spi)
     add_subdirectory_exclude_platforms(spi_flash)
     add_subdirectory_exclude_platforms(max7219_32x8_spi)
     add_subdirectory_exclude_platforms(max7219_8x7seg_spi)
+    add_subdirectory_exclude_platforms(cpol)
 else()
     message("Skipping SPI examples as hardware_spi is unavailable on this platform")
 endif()

spi/cpol/CMakeLists.txt

@@ -0,0 +1,12 @@
+add_executable(spi_cpol
+        spi_cpol.c
+        )
+
+# pull in common dependencies and additional spi hardware support
+target_link_libraries(spi_cpol pico_stdlib hardware_spi)
+
+# create map/bin/hex file etc.
+pico_add_extra_outputs(spi_cpol)
+
+# add url via pico_set_program_url
+example_auto_set_url(spi_cpol)

spi/cpol/spi_cpol.c

@@ -0,0 +1,26 @@
+#include "hardware/spi.h"
+#include "hardware/gpio.h"
+#include "pico/time.h"
+
+static int _sck = 2;
+static int _mosi = 3;
+static int _miso = 4;
+static int _cs = 5;
+static spi_inst_t* _spi = spi0;
+
+int main(){
+  gpio_set_function(_sck, GPIO_FUNC_SPI);
+  gpio_set_function(_mosi, GPIO_FUNC_SPI);
+  gpio_set_function(_miso, GPIO_FUNC_SPI);
+  gpio_set_function(_cs, GPIO_FUNC_SPI);
+
+  spi_init(_spi, 100000);
+  spi_set_format(_spi, 8, SPI_CPOL_0, SPI_CPHA_0, SPI_MSB_FIRST);
+
+  while(1) {
+    uint8_t value = 0xAA;
+    (void) spi_write_blocking(_spi, &value, sizeof(value));
+    sleep_ms(100);
+  }
+  return 0;
+}