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#include "project.h"
int
ssd1306_cmds (uint32_t i2c, uint8_t *buf, size_t len, int delay)
{
int ret = -1;
while (i2c_lock());
do {
if (i2cp_start_transaction (i2c, SSD1306_I2C_ADDRESS, I2C_WRITE))
break;
if (i2cp_send (i2c, SSD1306_COMMAND))
break;
while (len--)
if (i2cp_send (i2c, * (buf++)))
break;
i2cp_stop (i2c);
if (delay)
delay_us (delay);
ret = 0;
} while (0);
i2c_unlock();
return ret;
}
int
ssd1306_cmd (uint32_t i2c, uint8_t cmd, int delay)
{
return ssd1306_cmds (i2c, &cmd, 1, delay);
}
void
oled_generate_stream (uint8_t *vram)
{
memset (vram, 0, DMA_BUF_SZ);
vram[0] = SSD1306_DATA_CONTINUE;
}
void
oled_cls (uint8_t *vram)
{
memset (vram + 1, 0, SSD1306_VRAM_SIZE);
}
void
oled_on (uint32_t i2c)
{
ssd1306_cmd (i2c, SSD1306_DISPLAY_ON, 0);
}
void
oled_off (uint32_t i2c)
{
ssd1306_cmd (i2c, SSD1306_DISPLAY_OFF, 0);
}
#if 0
void
oled_squirt (void)
{
unsigned i;
uint8_t cmds[] = {
SSD1306_SET_PAGE_ADDR, 0, 0xff,
SSD1306_SET_COLUMN_ADDR, 0, SSD1306_WIDTH - 1
};
ssd1306_cmds (cmds, sizeof (cmds), 0);
while (i2c_lock());
i2cp_start_transaction (SSD1306_I2C_ADDRESS, I2C_WRITE);
for (i = 0; i < DMA_BUF_SZ; ++i)
i2cp_send (update_buf[i]);
i2cp_stop();
i2c_unlock();
}
#endif
void
oled_reset (uint32_t i2c)
{
uint8_t init[] = {
SSD1306_DISPLAY_OFF,
SSD1306_SET_DISPLAY_CLOCK_DIV_RATIO, 0x80,
SSD1306_SET_MULTIPLEX_RATIO, SSD1306_HEIGHT - 1,
SSD1306_SET_DISPLAY_OFFSET, 0x0,
SSD1306_SET_START_LINE | 0x0,
SSD1306_CHARGE_PUMP, 0x14,
SSD1306_MEMORY_ADDR_MODE, 0x00,
SSD1306_SET_SEGMENT_REMAP | 0x1,
SSD1306_COM_SCAN_DIR_DEC,
//SSD1306_SET_COM_PINS, 0x12,
SSD1306_SET_COM_PINS, 0x02,
//SSD1306_SET_CONTRAST_CONTROL, 0xCF,
SSD1306_SET_CONTRAST_CONTROL, 0x8F,
SSD1306_SET_PRECHARGE_PERIOD, 0xF1,
SSD1306_SET_VCOM_DESELECT, 0x40,
SSD1306_DISPLAY_ALL_ON_RESUME,
SSD1306_NORMAL_DISPLAY,
SSD1306_DISPLAY_ON,
};
ssd1306_cmds (i2c, init, sizeof (init), 0);
}
void
oled_const_strip (uint8_t *vram, int x, int xe, uint8_t and, uint8_t or)
{
uint8_t r;
for (x++; x <= xe; ++x) {
r = vram[x] & and;
vram[x] = r | or;
}
}
void
oled_blit_strip (uint8_t *vram, int x, int xe, uint8_t mask, int shift,
uint8_t *src)
{
uint8_t r, s;
while (x < 0) {
x++;
src++;
};
if (xe < 0) xe = 0;
if (x > SSD1306_VRAM_SIZE) xe = SSD1306_VRAM_SIZE;
if (xe > SSD1306_VRAM_SIZE) xe = SSD1306_VRAM_SIZE;
if (shift > 0) {
for (x++; x <= xe; ++x) {
s = * (src++);
s <<= shift;
s &= mask;
r = vram[x] & ~mask;
vram[x] = r | s;
}
} else if (shift < 0) {
shift = -shift;
for (x++; x <= xe; ++x) {
s = * (src++);
s >>= shift;
s &= mask;
r = vram[x] & ~mask;
vram[x] = r | s;
}
} else {
for (x++; x <= xe; ++x) {
s = * (src++);
s &= mask;
r = vram[x] & ~mask;
vram[x] = r | s;
}
}
}
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