diff options
Diffstat (limited to 'ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_raspberrypi_ssd_i2c.c')
-rwxr-xr-x | ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_raspberrypi_ssd_i2c.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_raspberrypi_ssd_i2c.c b/ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_raspberrypi_ssd_i2c.c new file mode 100755 index 000000000..88d85ded2 --- /dev/null +++ b/ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_raspberrypi_ssd_i2c.c @@ -0,0 +1,176 @@ +/* + Special pin usage: + U8G_PI_I2C_OPTION additional options + U8G_PI_A0_STATE used to store the last value of the command/data register selection + U8G_PI_SET_A0 1: Signal request to update I2C device with new A0_STATE, 0: Do nothing, A0_STATE matches I2C device + U8G_PI_SCL clock line (NOT USED) + U8G_PI_SDA data line (NOT USED) + + U8G_PI_RESET reset line (currently disabled, see below) + + Protocol: + SLA, Cmd/Data Selection, Arguments + The command/data register is selected by a special instruction byte, which is sent after SLA + + The continue bit is always 0 so that a (re)start is equired for the change from cmd to/data mode +*/ + +#include "u8g.h" + +#if defined(U8G_RASPBERRY_PI) + +#include <wiringPi.h> +#include <wiringPiI2C.h> +#include <stdio.h> +#include <stdlib.h> +#include <errno.h> + +#define I2C_SLA 0x3c +#define I2C_CMD_MODE 0x000 +#define I2C_DATA_MODE 0x040 + +#if defined(U8G_WITH_PINLIST) + +uint8_t u8g_com_raspberrypi_ssd_start_sequence(u8g_t *u8g) +{ + /* are we requested to set the a0 state? */ + if ( u8g->pin_list[U8G_PI_SET_A0] == 0 ) + return 1; + + /* setup bus, might be a repeated start */ + if ( u8g_i2c_start(I2C_SLA) == 0 ) + return 0; + if ( u8g->pin_list[U8G_PI_A0_STATE] == 0 ) + { + if ( u8g_i2c_send_mode(I2C_CMD_MODE) == 0 ) + return 0; + } + else + { + if ( u8g_i2c_send_mode(I2C_DATA_MODE) == 0 ) + return 0; + } + + + u8g->pin_list[U8G_PI_SET_A0] = 0; + return 1; +} + +uint8_t u8g_com_raspberrypi_ssd_i2c_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) +{ + switch(msg) + { + case U8G_COM_MSG_INIT: + u8g_i2c_init(u8g->pin_list[U8G_PI_I2C_OPTION]); + u8g_SetPIOutput(u8g, U8G_PI_RESET); + u8g_SetPIOutput(u8g, U8G_PI_A0); + break; + + case U8G_COM_MSG_STOP: + break; + + case U8G_COM_MSG_RESET: + break; + + case U8G_COM_MSG_CHIP_SELECT: + u8g->pin_list[U8G_PI_A0_STATE] = 0; + u8g->pin_list[U8G_PI_SET_A0] = 1; /* force a0 to set again, also forces start condition */ + if ( arg_val == 0 ) + { + /* disable chip, send stop condition */ + u8g_i2c_stop(); + } + else + { + /* enable, do nothing: any byte writing will trigger the i2c start */ + } + break; + + case U8G_COM_MSG_WRITE_BYTE: + //u8g->pin_list[U8G_PI_SET_A0] = 1; + if ( u8g_com_raspberrypi_ssd_start_sequence(u8g) == 0 ) + return u8g_i2c_stop(), 0; + if ( u8g_i2c_send_byte(arg_val) == 0 ) + return u8g_i2c_stop(), 0; + // u8g_i2c_stop(); + break; + + case U8G_COM_MSG_WRITE_SEQ: + //u8g->pin_list[U8G_PI_SET_A0] = 1; + if ( u8g_com_raspberrypi_ssd_start_sequence(u8g) == 0 ) + return u8g_i2c_stop(), 0; + { + register uint8_t *ptr = (uint8_t *)arg_ptr; + while( arg_val > 0 ) + { + if ( u8g_i2c_send_byte(*ptr++) == 0 ) + return u8g_i2c_stop(), 0; + arg_val--; + } + } + // u8g_i2c_stop(); + break; + + case U8G_COM_MSG_WRITE_SEQ_P: + //u8g->pin_list[U8G_PI_SET_A0] = 1; + if ( u8g_com_raspberrypi_ssd_start_sequence(u8g) == 0 ) + return u8g_i2c_stop(), 0; + { + register uint8_t *ptr = (uint8_t *)arg_ptr; + while( arg_val > 0 ) + { + if ( u8g_i2c_send_byte(u8g_pgm_read(ptr)) == 0 ) + return 0; + ptr++; + arg_val--; + } + } + // u8g_i2c_stop(); + break; + + case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */ + u8g->pin_list[U8G_PI_A0_STATE] = arg_val; + u8g->pin_list[U8G_PI_SET_A0] = 1; /* force a0 to set again */ + +#ifdef OLD_CODE + if ( i2c_state != 0 ) + { + u8g_i2c_stop(); + i2c_state = 0; + } + + if ( u8g_com_raspberrypi_ssd_start_sequence(arg_val) == 0 ) + return 0; + + /* setup bus, might be a repeated start */ + /* + if ( u8g_i2c_start(I2C_SLA) == 0 ) + return 0; + if ( arg_val == 0 ) + { + i2c_state = 1; + + if ( u8g_i2c_send_byte(I2C_CMD_MODE) == 0 ) + return 0; + } + else + { + i2c_state = 2; + if ( u8g_i2c_send_byte(I2C_DATA_MODE) == 0 ) + return 0; + } + */ +#endif + break; + } + return 1; +} + +#else /* defined(U8G_WITH_PINLIST) */ + +uint8_t u8g_com_raspberrypi_ssd_i2c_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) { + return 1; +} + +#endif /* defined(U8G_WITH_PINLIST) */ +#endif |