Diff: main.cpp

Revision:

0:96ad87d71144

Child:

1:979d4820e32a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 06 12:50:47 2018 +0000
@@ -0,0 +1,144 @@
+#include "mbed.h"
+
+DigitalIn miso(D8);
+DigitalOut mosi(D7);
+DigitalOut clk(D6);
+
+unsigned char lcam_buffer[102];
+
+void lcam_pulse(void) { 
+    clk = 1;
+    clk = 0;
+}
+
+void lcam_pulse_clock(uint8_t times){ 
+    for(unsigned char i = 0; i < times; i++)
+    {
+        lcam_pulse();
+    }
+}
+
+void lcam_send(uint8_t value){ 
+    // Start bit
+    mosi = 0;
+    lcam_pulse();
+    // Send 8 bits to camera
+    for(unsigned char i = 0; i < 8; i++)
+    {
+        mosi = ((value >> i) & 1);
+        lcam_pulse();
+    }
+    // Stop bit
+    mosi = 1;
+    lcam_pulse();
+}
+
+void lcam_reset(void){ 
+    wait_ms(1);
+  
+    // 10 clock impulsions with SDIN held high to clear the receiver logic
+    mosi = 1;
+    lcam_pulse_clock(10);
+    // 3 reset instructions to clear the control logic
+    lcam_send(0x1b);
+    lcam_send(0x1b);
+    lcam_send(0x1b);
+    // 30 clock impulsions to assure the state of SDOUT
+    lcam_pulse_clock(30);
+  
+    // register write mode
+    lcam_send(0X5F);
+    // Clear mode register (single chip, not sleep)
+    lcam_send(0x00);
+}
+
+void lcam_setup(void){ 
+    lcam_reset();
+  
+  // set inputs and outputs
+  //clk = 1;
+  //pin_mode(LCAM_PORT, LCAM_SDIN, 1);
+  //pin_mode(LCAM_PORT, LCAM_SDOUT, 0);
+  // make sure the clock is cleared
+  clk = 0;
+  
+  // Left offset
+  lcam_send(0x40);
+  lcam_send(0);
+  // Left gain
+  lcam_send(0x41);
+  lcam_send(15);
+  // Middle offset
+  lcam_send(0x42);
+  lcam_send(0);
+  // Middle gain
+  lcam_send(0x43);
+  lcam_send(15);
+  // Right offset
+  lcam_send(0x44);
+  lcam_send(0);
+  // Right gain
+  lcam_send(0x45);
+  lcam_send(15);
+}
+
+void lcam_startintegration(void){ 
+      // Send start integration command
+    lcam_send(0x08);
+    // delayed until the pixel reset cycle has been completed (22-clock delay)
+    lcam_pulse_clock(22);
+}
+
+void lcam_endintegration(void){ 
+    // Sample int command
+    lcam_send(0x10);
+    // pixel reset sequence is initiated, requires 22 clocks
+    lcam_pulse_clock(22);
+}
+
+void lcam_integrate(unsigned int microseconds){ 
+    lcam_startintegration();
+    wait_us(microseconds);
+    lcam_endintegration();
+}
+
+unsigned char* lcam_getdata(void){ 
+     return lcam_buffer;
+}
+
+void lcam_read(void){ 
+    unsigned char i, pixel_bit, pixel;
+  // Read pixel command
+  lcam_send(0x02);
+  // 44-clock cycle delay until the first pixel data is output
+  lcam_pulse_clock(44);
+  // Read the 102 pixels from the camera
+  for(i = 0; i < 102; i++)
+  {
+    pixel = 0;
+    // pulse the pixel start bit (SDOUT = 0)
+    lcam_pulse();
+    // read a byte, bit by bit
+    for(pixel_bit = 0; pixel_bit < 8; pixel_bit++)
+    {
+      clk = 1;
+      // read pin while clock is at 1
+      pixel |= (((miso) & 1) << pixel_bit);
+      clk = 0;
+    }
+    // store byte to buffer
+    lcam_buffer[i] = pixel;
+    // pulse the pixel stop bit (SDOUT = 1)
+    lcam_pulse();
+}
+}
+
+unsigned char lcam_getpic(void){ 
+    
+}
+
+int main() {  
+    while(1) {
+
+    }
+}