update repo structure

update poster
add code flowchart

1 files changed, 34 insertions, 0 deletions

diff --git a/debug/comm/spi/arduino_spi_master/arduino_spi_master.ino b/debug/comm/spi/arduino_spi_master/arduino_spi_master.ino
new file mode 100644
index 0000000..248ef0f
--- /dev/null
+++ b/debug/comm/spi/arduino_spi_master/arduino_spi_master.ino
@@ -0,0 +1,34 @@
+#include <SPI.h>
+#define SS_PIN 10
+#define BAUD_RATE 19200
+#define CHAR_BUF 128
+
+void setup() {
+  pinMode(SS_PIN, OUTPUT);
+  Serial.begin(BAUD_RATE);
+  SPI.begin();
+  SPI.setBitOrder(MSBFIRST);
+  SPI.setClockDivider(SPI_CLOCK_DIV16);
+  SPI.setDataMode(SPI_MODE0);
+  delay(1000); // Give the OpenMV Cam time to bootup.
+}
+
+void loop() {
+  int32_t len = 0;
+  char buff[CHAR_BUF] = {0};
+  digitalWrite(SS_PIN, LOW);
+  delay(1); // Give the OpenMV Cam some time to setup to send data.
+
+  if(SPI.transfer(1) == 85) { // saw sync char?
+    SPI.transfer(&len, 4); // get length
+    if (len) {
+      SPI.transfer(&buff, min(len, CHAR_BUF));
+      len -= min(len, CHAR_BUF);
+    }
+    while (len--) SPI.transfer(0); // eat any remaining bytes
+  }
+
+  digitalWrite(SS_PIN, HIGH);
+  Serial.print(buff);
+  delay(1); // Don't loop to quickly.
+}
\ No newline at end of file