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add/fix mcp23017 i2c gpio expander functions and tests 

Change-Id: Ia2e5a1bf3f97272931014e54e587109297556c03
This commit is contained in:
Joachim Steiger 2019-10-24 18:09:05 +02:00
parent 3feadfa910
commit f7f1ea864d
6 changed files with 52 additions and 9 deletions
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4
firmware/apps/gpio_test/gpio_test.c
View File

@ -2,9 +2,7 @@
#include "utils.h"
#include "chip.h"
void gpio_test_init(void)
{
printf("FIXME run tests here\n\n");
printf("FIXME run tests here\n\r");
}

2
firmware/libboard/octsimtest/include/i2c.h
View File

@ -22,7 +22,7 @@ void i2c_pin_init(void);
bool i2c_write_byte(bool send_start, bool send_stop, uint8_t byte);
uint8_t i2c_read_byte(bool nack, bool send_stop);
static void i2c_stop_cond(void);
void i2c_stop_cond(void);
int eeprom_write_byte(uint8_t slave, uint8_t addr, uint8_t byte);
int eeprom_read_byte(uint8_t slave, uint8_t addr);

2
firmware/libboard/octsimtest/include/mcp23017.h
View File

@ -19,5 +19,7 @@
#define MCP23017_ADDRESS 0x20
int mcp23017_init(uint8_t slave);
int mcp23017_test(uint8_t slave);
int mcp23017_toggle(uint8_t slave);
//int mcp23017_write_byte(uint8_t slave, uint8_t addr, uint8_t byte);
//int mcp23017_read_byte(uint8_t slave, uint8_t addr);

11
firmware/libboard/octsimtest/source/board_octsimtest.c
View File

@ -32,12 +32,20 @@ void board_exec_dbg_cmd(int ch)
case '?':
printf("\t?\thelp\n\r");
printf("\tR\treset SAM3\n\r");
printf("\tm\trun mcp23017 test\n\r");
printf("\tR\ttoggle MSB of gpio on mcp23017\n\r");
break;
case 'R':
printf("Asking NVIC to reset us\n\r");
USBD_Disconnect();
NVIC_SystemReset();
break;
case 'm':
mcp23017_test(MCP23017_ADDRESS);
break;
case 't':
mcp23017_toggle(MCP23017_ADDRESS);
break;
default:
printf("Unknown command '%c'\n\r", ch);
break;
@ -50,7 +58,8 @@ void board_main_top(void)
usb_buf_init();
i2c_pin_init();
mcp23017_init(MCP23017_ADDRESS);
if (!mcp23017_init(MCP23017_ADDRESS))
printf("mcp23017 not found!\n\r");
/* Initialize checking for card insert/remove events */
//card_present_init();
#endif

2
firmware/libboard/octsimtest/source/i2c.c
View File

@ -96,7 +96,7 @@ static void i2c_start_cond(void)
i2c_started = true;
}
static void i2c_stop_cond(void)
void i2c_stop_cond(void)
{
clear_sda();
set_scl();

40
firmware/libboard/octsimtest/source/mcp23017.c
View File

@ -94,13 +94,47 @@ out_stop:
int mcp23017_init(uint8_t slave)
{
printf("mcp23017_init\n");
printf("mcp23017_init\n\r");
// all gpio input
if (mcp23017_write_byte(slave, MCP23017_IODIRA, 0xff))
return false;
if (mcp23017_write_byte(slave, MCP23017_IODIRB, 0xff))
// msb of portb output, rest input
if (mcp23017_write_byte(slave, MCP23017_IODIRB, 0x7f))
return false;
printf("mcp23017 found\n");
if (mcp23017_write_byte(slave, MCP23017_IOCONA, 0x20)) //disable SEQOP (autoinc addressing)
return false;
printf("mcp23017 found\n\r");
return true;
}
int mcp23017_test(uint8_t slave)
{
printf("mcp23017_test\n\r");
printf("GPIOA 0x%x\n\r", mcp23017_read_byte(slave,MCP23017_GPIOA));
printf("GPIOB 0x%x\n\r", mcp23017_read_byte(slave,MCP23017_GPIOB));
printf("IODIRA 0x%x\n\r", mcp23017_read_byte(slave,MCP23017_IODIRA));
printf("IODIRB 0x%x\n\r", mcp23017_read_byte(slave,MCP23017_IODIRB));
printf("IOCONA 0x%x\n\r", mcp23017_read_byte(slave,MCP23017_IOCONA));
printf("IOCONB 0x%x\n\r", mcp23017_read_byte(slave,MCP23017_IOCONB));
return 0;
}
int mcp23017_toggle(uint8_t slave)
{
// example writing MSB of gpio
static bool foo=false;
if (foo)
{
printf("+\n\r");
mcp23017_write_byte(slave, MCP23017_OLATB, 0x80);
foo=false;
}
else
{
printf("-\n\r");
mcp23017_write_byte(slave, MCP23017_OLATB, 0x00);
foo=true;
}
return 0;
}