Samuel Pullman / Mbed 2 deprecated CameraTest

OV7670 + 23LC1024 + Bluetooth

Dependencies:   FastPWM MODSERIAL mbed

spi_ram/spi_ram.cpp@2:a7f5fa80a385, 2013-07-23 (annotated)

Committer:
sampullman
Date:
Tue Jul 23 06:36:50 2013 +0000
Revision:
2:a7f5fa80a385
Parent:
1:6e4d2cff76e8 
Fixed OV7670.cpp file name

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sampullman 1:6e4d2cff76e8 1 #include "spi_ram.h"
sampullman 1:6e4d2cff76e8 2
sampullman 1:6e4d2cff76e8 3 SRAM::SRAM(SPI& spiDef, PinName csiPin) : spi(spiDef), csi(csiPin) {
sampullman 1:6e4d2cff76e8 4 deselect();
sampullman 1:6e4d2cff76e8 5 }
sampullman 1:6e4d2cff76e8 6
sampullman 1:6e4d2cff76e8 7 void SRAM::select() {
sampullman 1:6e4d2cff76e8 8 csi = 0;
sampullman 1:6e4d2cff76e8 9 }
sampullman 1:6e4d2cff76e8 10
sampullman 1:6e4d2cff76e8 11 void SRAM::deselect() {
sampullman 1:6e4d2cff76e8 12 csi = 1;
sampullman 1:6e4d2cff76e8 13 }
sampullman 1:6e4d2cff76e8 14
sampullman 1:6e4d2cff76e8 15 void SRAM::writeStatus(char status) {
sampullman 1:6e4d2cff76e8 16 select();
sampullman 1:6e4d2cff76e8 17 spi.write(WRITE_STATUS);
sampullman 1:6e4d2cff76e8 18 spi.write(status);
sampullman 1:6e4d2cff76e8 19 deselect();
sampullman 1:6e4d2cff76e8 20 }
sampullman 1:6e4d2cff76e8 21
sampullman 1:6e4d2cff76e8 22 char SRAM::readStatus() {
sampullman 1:6e4d2cff76e8 23 select();
sampullman 1:6e4d2cff76e8 24 spi.write(READ_STATUS);
sampullman 1:6e4d2cff76e8 25 char result = (char)spi.write(0);
sampullman 1:6e4d2cff76e8 26 deselect();
sampullman 1:6e4d2cff76e8 27 return result;
sampullman 1:6e4d2cff76e8 28 }
sampullman 1:6e4d2cff76e8 29
sampullman 1:6e4d2cff76e8 30 void SRAM::prepareCommand(char command, int address) {
sampullman 1:6e4d2cff76e8 31 select();
sampullman 1:6e4d2cff76e8 32 spi.write(command);
sampullman 1:6e4d2cff76e8 33 spi.write(address >> 16);
sampullman 1:6e4d2cff76e8 34 spi.write((address >> 8) & 0xFF);
sampullman 1:6e4d2cff76e8 35 spi.write(address & 0xFF);
sampullman 1:6e4d2cff76e8 36 }
sampullman 1:6e4d2cff76e8 37
sampullman 1:6e4d2cff76e8 38 void SRAM::startWriteSequence() {
sampullman 1:6e4d2cff76e8 39 select();
sampullman 1:6e4d2cff76e8 40 writeStatus(SEQUENTIAL_MODE);
sampullman 1:6e4d2cff76e8 41 prepareCommand(WRITE, 0);
sampullman 1:6e4d2cff76e8 42 }
sampullman 1:6e4d2cff76e8 43
sampullman 1:6e4d2cff76e8 44 void SRAM::writeSequence0(char c) {
sampullman 1:6e4d2cff76e8 45 while (!(LPC_SSP0->SR & TNF)); // While TNF-Bit = 0, wait for FIFO
sampullman 1:6e4d2cff76e8 46 LPC_SSP0->DR = c; // Write to FIFO buffer
sampullman 1:6e4d2cff76e8 47 while( !(LPC_SSP0->SR & RNE));
sampullman 1:6e4d2cff76e8 48 uint8_t v = LPC_SSP0->DR;
sampullman 1:6e4d2cff76e8 49 }
sampullman 1:6e4d2cff76e8 50
sampullman 1:6e4d2cff76e8 51 void SRAM::writeSequence1(char c) {
sampullman 1:6e4d2cff76e8 52 while (!(LPC_SSP1->SR & TNF)); // While TNF-Bit = 0, wait for FIFO
sampullman 1:6e4d2cff76e8 53 LPC_SSP1->DR = c; // Write to FIFO buffer
sampullman 1:6e4d2cff76e8 54 while( !(LPC_SSP1->SR & RNE));
sampullman 1:6e4d2cff76e8 55 uint8_t v = LPC_SSP1->DR;
sampullman 1:6e4d2cff76e8 56 }
sampullman 1:6e4d2cff76e8 57
sampullman 1:6e4d2cff76e8 58 void SRAM::startReadSequence() {
sampullman 1:6e4d2cff76e8 59 select();
sampullman 1:6e4d2cff76e8 60 writeStatus(SEQUENTIAL_MODE);
sampullman 1:6e4d2cff76e8 61 prepareCommand(READ, 0);
sampullman 1:6e4d2cff76e8 62 }
sampullman 1:6e4d2cff76e8 63
sampullman 1:6e4d2cff76e8 64 char SRAM::readSequence0() {
sampullman 1:6e4d2cff76e8 65 while (!(LPC_SSP0->SR & TNF)); // While TNF-Bit = 0, wait for FIFO
sampullman 1:6e4d2cff76e8 66 LPC_SSP0->DR = 0; // Write to FIFO buffer
sampullman 1:6e4d2cff76e8 67 while( !(LPC_SSP0->SR & RNE));
sampullman 1:6e4d2cff76e8 68 return LPC_SSP0->DR;
sampullman 1:6e4d2cff76e8 69 }
sampullman 1:6e4d2cff76e8 70
sampullman 1:6e4d2cff76e8 71 char SRAM::readSequence1() {
sampullman 1:6e4d2cff76e8 72 while (!(LPC_SSP1->SR & TNF)); // While TNF-Bit = 0, wait for FIFO
sampullman 1:6e4d2cff76e8 73 LPC_SSP1->DR = 0; // Write to FIFO buffer
sampullman 1:6e4d2cff76e8 74 while( !(LPC_SSP1->SR & RNE));
sampullman 1:6e4d2cff76e8 75 return LPC_SSP1->DR;
sampullman 1:6e4d2cff76e8 76 }
sampullman 1:6e4d2cff76e8 77
sampullman 1:6e4d2cff76e8 78 void SRAM::stopSequence() {
sampullman 1:6e4d2cff76e8 79 deselect();
sampullman 1:6e4d2cff76e8 80 writeStatus(BYTE_MODE);
sampullman 1:6e4d2cff76e8 81 }