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mcp23s17 ansprechbar

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This commit is contained in:
Tristan Krause 2019-03-25 13:42:32 +01:00
parent 08795e7547
commit d3afcc2f37
7 changed files with 114 additions and 46 deletions
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BIN
B15F.elf
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52
B15F.hex
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@ -6,19 +6,45 @@
:100050000C9464000C9464000C9464000C94640090
:100060000C9464000C9464000C9464000C94640080
:100070000C9464000C9464000C9464000C94640070
:100080000C9464000C9464000C9464009F00112490
:100080000C9464000C9464000C94640070011124BE
:100090001FBECFEFD0E4DEBFCDBF21E0A0E0B1E0D6
:1000A00001C01D92A430B207E1F710E0C7E4D0E030
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:1001400091E00E94660042E063E071E080E091E0AF
:100150000C948A00EE0FFF1F0024001C0BBE0790BA
:0A016000F691E02D0994F894FFCF0A
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:0C0300000790F691E02D0994F894FFCFCF
:00000001FF

7
main.cpp
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@ -9,12 +9,11 @@ MCP23S17 beba0(spi, SPIADR::BEBA0);
int main() {
spi.init();
beba0.setDirA(0x00); // alle Ausgang
beba0.setDirB(0xFF); // alle Eingang
while(1) {
SPDR = 8;
while(!(SPSR & _BV(SPIF)));
//spi.pushByte(8);
beba0.writePortA(beba0.readPortB());
}
return 0;

77
mcp23s17.cpp
View file

@ -2,33 +2,60 @@
MCP23S17::MCP23S17(SPI& spi, uint8_t adr) : spi(spi), adr(adr)
{
}
void MCP23S17::setPort(uint8_t port) const
void MCP23S17::setDirA(uint8_t dir) const
{
spi.pushByte(0x40);
/*
spi.setAdr(0);
_delay_ms(1);
spi.setAdr(adr);
spi.pushByte(0x40); //
spi.pushByte(0x00); // DIR A
spi.pushByte(0x00); // alle ausgang
spi.setAdr(0);
_delay_ms(1);
spi.setAdr(adr);
spi.pushByte(0x40);
spi.pushByte(0x12);
spi.pushByte(0xF0);
spi.setAdr(0);
/*while(1) {
PORTB ^= _BV(PB7);
_delay_ms(1);
}*/
spi.pushByte(MCP23S17_OPCODE | MCP23S17_WRITE);
spi.pushByte(MCP23S17_DIRA);
spi.pushByte(dir);
spi.setAdr(SPIADR::NONE);
}
void MCP23S17::setDirB(uint8_t dir) const
{
spi.setAdr(adr);
spi.pushByte(MCP23S17_OPCODE | MCP23S17_WRITE);
spi.pushByte(MCP23S17_DIRB);
spi.pushByte(dir);
spi.setAdr(SPIADR::NONE);
}
void MCP23S17::writePortA(uint8_t port) const
{
spi.setAdr(adr);
spi.pushByte(MCP23S17_OPCODE | MCP23S17_WRITE);
spi.pushByte(MCP23S17_PORTA);
spi.pushByte(port);
spi.setAdr(SPIADR::NONE);
}
void MCP23S17::writePortB(uint8_t port) const
{
spi.setAdr(adr);
spi.pushByte(MCP23S17_OPCODE | MCP23S17_WRITE);
spi.pushByte(MCP23S17_PORTB);
spi.pushByte(port);
spi.setAdr(SPIADR::NONE);
}
uint8_t MCP23S17::readPortA(void) const
{
spi.setAdr(adr);
spi.pushByte(MCP23S17_OPCODE | MCP23S17_READ);
spi.pushByte(MCP23S17_PORTA);
uint8_t port = spi.pushByte(0);
spi.setAdr(SPIADR::NONE);
return port;
}
uint8_t MCP23S17::readPortB(void) const
{
spi.setAdr(adr);
spi.pushByte(MCP23S17_OPCODE | MCP23S17_READ);
spi.pushByte(MCP23S17_PORTB);
uint8_t port = spi.pushByte(0);
spi.setAdr(SPIADR::NONE);
return port;
}

15
mcp23s17.h
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@ -3,11 +3,24 @@
#include "spi.h"
constexpr uint8_t MCP23S17_DIRA = 0x00;
constexpr uint8_t MCP23S17_DIRB = 0x01;
constexpr uint8_t MCP23S17_PORTA = 0x12;
constexpr uint8_t MCP23S17_PORTB = 0x13;
constexpr uint8_t MCP23S17_READ = 0x01;
constexpr uint8_t MCP23S17_WRITE = 0x00;
constexpr uint8_t MCP23S17_OPCODE = 0x40;
class MCP23S17
{
public:
MCP23S17(SPI&, uint8_t);
void setPort(uint8_t) const;
void setDirA(uint8_t dir) const;
void setDirB(uint8_t dir) const;
void writePortA(uint8_t) const;
void writePortB(uint8_t) const;
uint8_t readPortA(void) const;
uint8_t readPortB(void) const;
private:
SPI& spi;

7
spi.cpp
View file

@ -8,22 +8,24 @@ void SPI::init(void) const
{
// Konfiguriere SPI DDRs
dMode(SLSL, OUT);
dMode(MOSI, OUT);
dMode(MISO, IN);
dMode(SCLK, OUT);
// Konfiguriere DMUX DDRs
dMode(DMUX1, OUT);
dMode(DMUX2, OUT);
dMode(DMUX3, OUT);
DDRB = 0xB0;
// aktiviere SPI, Master Modus, SPI Modus 0
// F_SPI = F_CPU / 2 (prescaler 2)
SPCR = _BV(SPE) | _BV(MSTR);
SPSR = _BV(SPI2X);
// waehle keinen SPI Slave aus
setAdr(SPIADR::NONE);
}
/*void SPI::setFreq(uint32_t freq) const
@ -49,6 +51,5 @@ uint8_t SPI::pushByte(uint8_t b) const
{
SPDR = b;
while(!(SPSR & _BV(SPIF)));
_delay_ms(1);
return SPDR;
}

2
spi.h
View file

@ -5,6 +5,7 @@
#include <stdint.h>
#include "pio.h"
#define SLSL B4
#define MOSI B5
#define MISO B6
#define SCLK B7
@ -16,6 +17,7 @@
enum SPIADR {
BEBA0 = 2,
BEBA1 = 3,
NONE = 7,
};
class SPI