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Diffstat (limited to 'ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_raspberrypi_ssd_i2c.c')
-rwxr-xr-xArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_raspberrypi_ssd_i2c.c176
1 files changed, 176 insertions, 0 deletions
diff --git a/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_raspberrypi_ssd_i2c.c b/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_raspberrypi_ssd_i2c.c
new file mode 100755
index 000000000..88d85ded2
--- /dev/null
+++ b/ArduinoAddons/Arduino_1.0.x/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