optimize source code for size. reduce compiled binary size 292 bytes (#8428)
* optimize source code for size. reduce compiled binary size 292 bytes * more size optimization
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bottilabo
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@ -15,6 +15,14 @@
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extern const unsigned char font[] PROGMEM;
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#ifndef OLED_BLANK_CHAR
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#define OLED_BLANK_CHAR ' '
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#endif
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#ifndef OLED_BITS_FILTER
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#define OLED_BITS_FILTER
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#endif
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// Set this to 1 to help diagnose early startup problems
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// when testing power-on with ble. Turn it off otherwise,
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// as the latency of printing most of the debug info messes
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@ -26,8 +34,11 @@ extern const unsigned char font[] PROGMEM;
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//#define BatteryUpdateInterval 10000 /* milliseconds */
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// 'last_flush' is declared as uint16_t,
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// so this must be less than 65535
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// so this must be less than 65535
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#ifndef ScreenOffInterval
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#define ScreenOffInterval 60000 /* milliseconds */
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#endif
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#if DEBUG_TO_SCREEN
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static uint8_t displaying;
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#endif
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@ -61,38 +72,32 @@ done:
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return res;
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}
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// Write 2-byte command sequence.
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// Returns true on success
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static inline bool _send_cmd2(uint8_t cmd, uint8_t opr) {
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if (!_send_cmd1(cmd)) {
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return false;
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}
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return _send_cmd1(opr);
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}
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// Write 3-byte command sequence.
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// Returns true on success
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static inline bool _send_cmd3(uint8_t cmd, uint8_t opr1, uint8_t opr2) {
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if (!_send_cmd1(cmd)) {
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return false;
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}
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if (!_send_cmd1(opr1)) {
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return false;
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}
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return _send_cmd1(opr2);
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}
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#define send_cmd1(c) if (!_send_cmd1(c)) {goto done;}
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#define send_cmd2(c,o) if (!_send_cmd2(c,o)) {goto done;}
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#define send_cmd3(c,o1,o2) if (!_send_cmd3(c,o1,o2)) {goto done;}
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#define send_cmds(c) if (!_send_cmds(c,sizeof(c))) {goto done;}
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#define cmd1(X) X
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#define cmd2(X,Y) X,Y
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#define cmd3(X,Y,Z) X,Y,Z
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static bool _send_cmds(const uint8_t* p,uint8_t sz) {
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for(uint8_t i=sz;i;i--) {
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send_cmd1( pgm_read_byte(p++) );
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}
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return true;
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done:
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return false;
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}
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#define SEND_CMDS(...) {static const uint8_t _cmds[] PROGMEM = { __VA_ARGS__,0 };send_cmds(_cmds);}
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static void clear_display(void) {
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matrix_clear(&display);
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// Clear all of the display bits (there can be random noise
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// in the RAM on startup)
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send_cmd3(PageAddr, 0, (DisplayHeight / 8) - 1);
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send_cmd3(ColumnAddr, 0, DisplayWidth - 1);
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SEND_CMDS(
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cmd3(PageAddr, 0, (DisplayHeight / 8) - 1),
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cmd3(ColumnAddr, 0, DisplayWidth - 1)
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);
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if (i2c_start_write(SSD1306_ADDRESS)) {
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goto done;
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@ -101,8 +106,8 @@ static void clear_display(void) {
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// Data mode
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goto done;
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}
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for (uint8_t row = 0; row < MatrixRows; ++row) {
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for (uint8_t col = 0; col < DisplayWidth; ++col) {
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for (uint8_t row = MatrixRows;row; row--) {
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for (uint8_t col = DisplayWidth; col; col--) {
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i2c_master_write(0);
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}
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}
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@ -130,38 +135,47 @@ bool iota_gfx_init(bool rotate) {
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bool success = false;
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i2c_master_init();
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send_cmd1(DisplayOff);
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send_cmd2(SetDisplayClockDiv, 0x80);
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send_cmd2(SetMultiPlex, DisplayHeight - 1);
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send_cmd2(SetDisplayOffset, 0);
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send_cmd1(SetStartLine | 0x0);
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send_cmd2(SetChargePump, 0x14 /* Enable */);
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send_cmd2(SetMemoryMode, 0 /* horizontal addressing */);
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SEND_CMDS(
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cmd1(DisplayOff),
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cmd2(SetDisplayClockDiv, 0x80),
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cmd2(SetMultiPlex, DisplayHeight - 1),
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cmd2(SetDisplayOffset, 0),
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cmd1(SetStartLine | 0x0),
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cmd2(SetChargePump, 0x14 /* Enable */),
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cmd2(SetMemoryMode, 0 /* horizontal addressing */)
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);
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if(rotate){
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// the following Flip the display orientation 180 degrees
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send_cmd1(SegRemap);
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send_cmd1(ComScanInc);
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SEND_CMDS(
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cmd1(SegRemap),
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cmd1(ComScanInc)
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);
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}else{
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// Flips the display orientation 0 degrees
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send_cmd1(SegRemap | 0x1);
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send_cmd1(ComScanDec);
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SEND_CMDS(
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cmd1(SegRemap | 0x1),
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cmd1(ComScanDec)
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);
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}
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send_cmd2(SetComPins, 0x2);
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send_cmd2(SetContrast, 0x8f);
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send_cmd2(SetPreCharge, 0xf1);
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send_cmd2(SetVComDetect, 0x40);
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send_cmd1(DisplayAllOnResume);
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send_cmd1(NormalDisplay);
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send_cmd1(DeActivateScroll);
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send_cmd1(DisplayOn);
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send_cmd2(SetContrast, 0); // Dim
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SEND_CMDS(
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#ifdef SSD1306_128X64
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cmd2(SetComPins, 0x12),
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#else
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cmd2(SetComPins, 0x2),
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#endif
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cmd2(SetContrast, 0x8f),
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cmd2(SetPreCharge, 0xf1),
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cmd2(SetVComDetect, 0x40),
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cmd1(DisplayAllOnResume),
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cmd1(NormalDisplay),
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cmd1(DeActivateScroll),
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cmd1(DisplayOn),
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cmd2(SetContrast, 0) // Dim
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);
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clear_display();
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success = true;
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@ -205,7 +219,7 @@ void matrix_write_char_inner(struct CharacterMatrix *matrix, uint8_t c) {
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memmove(&matrix->display[0], &matrix->display[1],
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MatrixCols * (MatrixRows - 1));
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matrix->cursor = &matrix->display[MatrixRows - 1][0];
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memset(matrix->cursor, ' ', MatrixCols);
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memset(matrix->cursor, OLED_BLANK_CHAR, MatrixCols);
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}
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}
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@ -218,7 +232,7 @@ void matrix_write_char(struct CharacterMatrix *matrix, uint8_t c) {
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uint8_t cursor_col = (matrix->cursor - &matrix->display[0][0]) % MatrixCols;
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while (cursor_col++ < MatrixCols) {
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matrix_write_char_inner(matrix, ' ');
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matrix_write_char_inner(matrix, OLED_BLANK_CHAR);
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}
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return;
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}
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@ -231,17 +245,15 @@ void iota_gfx_write_char(uint8_t c) {
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}
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void matrix_write(struct CharacterMatrix *matrix, const char *data) {
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const char *end = data + strlen(data);
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while (data < end) {
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while (*data) {
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matrix_write_char(matrix, *data);
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++data;
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}
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}
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void matrix_write_ln(struct CharacterMatrix *matrix, const char *data) {
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char data_ln[strlen(data)+2];
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snprintf(data_ln, sizeof(data_ln), "%s\n", data);
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matrix_write(matrix, data_ln);
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matrix_write(matrix, data);
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matrix_write(matrix, "\n");
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}
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void iota_gfx_write(const char *data) {
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@ -264,7 +276,7 @@ void iota_gfx_write_P(const char *data) {
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}
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void matrix_clear(struct CharacterMatrix *matrix) {
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memset(matrix->display, ' ', sizeof(matrix->display));
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memset(matrix->display, OLED_BLANK_CHAR, sizeof(matrix->display));
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matrix->cursor = &matrix->display[0][0];
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matrix->dirty = true;
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}
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@ -281,8 +293,10 @@ void matrix_render(struct CharacterMatrix *matrix) {
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#endif
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// Move to the home position
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send_cmd3(PageAddr, 0, MatrixRows - 1);
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send_cmd3(ColumnAddr, 0, (MatrixCols * FontWidth) - 1);
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SEND_CMDS(
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cmd3(PageAddr, 0, MatrixRows - 1),
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cmd3(ColumnAddr, 0, (MatrixCols * FontWidth) - 1)
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);
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if (i2c_start_write(SSD1306_ADDRESS)) {
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goto done;
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@ -298,7 +312,7 @@ void matrix_render(struct CharacterMatrix *matrix) {
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for (uint8_t glyphCol = 0; glyphCol < FontWidth; ++glyphCol) {
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uint8_t colBits = pgm_read_byte(glyph + glyphCol);
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i2c_master_write(colBits);
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i2c_master_write(colBits OLED_BITS_FILTER);
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}
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// 1 column of space between chars (it's not included in the glyph)
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@ -331,7 +345,7 @@ void iota_gfx_task(void) {
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force_dirty = false;
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}
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if (timer_elapsed(last_flush) > ScreenOffInterval) {
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if (ScreenOffInterval !=0 && timer_elapsed(last_flush) > ScreenOffInterval) {
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iota_gfx_off();
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}
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}
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