190 lines
6.7 KiB
C
190 lines
6.7 KiB
C
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/**
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Quick test for sending some visible data to a SSD1306 display connected
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via I2C. This means not to test the display, but the I2C implementation.
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To run this test, add this line to board or printer config.h:
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#define I2C
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With this done, a welcome message should appear on the display. Without
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these additions, the binary size should be as small as the commit before.
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*/
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#ifdef I2C_TEST
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#include <string.h>
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#include "config_wrapper.h"
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#include "delay.h"
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#include "i2c.h"
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#define DISPLAY_I2C_ADDRESS (0x3C << 1)
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static uint8_t display_init[] = {
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0x00, // Command marker.
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0xAE, // Display off.
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0xD5, 0x80, // Display clock divider (reset).
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0xA8, 0x1F, // 1/32 duty.
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0x40 | 0x00, // Start line (reset).
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0x20, 0x02, // Page addressing mode (reset).
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0xA0 | 0x00, // No segment remap (reset).
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0xC0 | 0x00, // Normal com pins mapping (reset).
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0xDA, 0x02, // Sequental without remap com pins.
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0x81, 0x7F, // Contrast (reset).
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0xDB, 0x20, // Vcomh (reset).
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0xD9, 0xF1, // Precharge period.
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0x8D, 0x14, // Charge pump.
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0xA6, // Positive display.
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0xA4, // Resume display.
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0xAF // Display on.
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};
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typedef struct {
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uint8_t columns;
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uint8_t data[4];
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} SYMBOL;
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SYMBOL font_8x4[] = {
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{2, {0x00, 0x00, 0x00, 0x00}}, /* space */
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{3, {0x0C, 0x5E, 0x0C, 0x00}}, /* excl_mark */
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{3, {0x03, 0x00, 0x03, 0x00}}, /* quot_mark */
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{4, {0x74, 0x2E, 0x74, 0x2E}}, /* num_sign */
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{4, {0x24, 0xCA, 0x53, 0x24}}, /* dlr_sign */
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{4, {0x44, 0x30, 0x0C, 0x22}}, /* prc_sign */
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{4, {0x33, 0x4D, 0x22, 0x00}}, /* ampersand */
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{2, {0x02, 0x01, 0x00, 0x00}}, /* apostrophe */
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{2, {0x3E, 0x41, 0x00, 0x00}}, /* lparent */
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{2, {0x41, 0x3E, 0x00, 0x00}}, /* rparent */
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{3, {0x14, 0x3E, 0x14, 0x00}}, /* asterisk */
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{3, {0x08, 0x1C, 0x08, 0x00}}, /* plus_sign */
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{2, {0x40, 0x20, 0x00, 0x00}}, /* comma */
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{3, {0x08, 0x08, 0x08, 0x00}}, /* minus_sign */
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{1, {0x20, 0x00, 0x00, 0x00}}, /* dot */
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{3, {0x30, 0x0C, 0x03, 0x00}}, /* solidus */
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{4, {0x3E, 0x41, 0x41, 0x3E}}, /* num_0 */
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{3, {0x44, 0x7F, 0x40, 0x00}}, /* num_1 */
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{4, {0x62, 0x51, 0x49, 0x46}}, /* num_2 */
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{4, {0x22, 0x49, 0x49, 0x36}}, /* num_3 */
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{4, {0x0F, 0x08, 0x08, 0x7E}}, /* num_4 */
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{4, {0x27, 0x45, 0x45, 0x39}}, /* num_5 */
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{4, {0x3E, 0x45, 0x45, 0x38}}, /* num_6 */
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{4, {0x01, 0x71, 0x09, 0x07}}, /* num_7 */
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{4, {0x36, 0x49, 0x49, 0x36}}, /* num_8 */
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{4, {0x26, 0x49, 0x49, 0x3E}}, /* num_9 */
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{1, {0x24, 0x00, 0x00, 0x00}}, /* colon */
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{2, {0x40, 0x24, 0x00, 0x00}}, /* semicolon */
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{3, {0x08, 0x14, 0x22, 0x00}}, /* less_sign */
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{3, {0x14, 0x14, 0x14, 0x00}}, /* equal_sign */
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{3, {0x22, 0x14, 0x08, 0x00}}, /* great_sign */
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{3, {0x02, 0x51, 0x0E, 0x00}}, /* ques_mark */
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{4, {0x7E, 0x99, 0xA5, 0x3E}}, /* at */
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{3, {0x7E, 0x11, 0x7F, 0x00}}, /* a_cap */
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{3, {0x7F, 0x49, 0x36, 0x00}}, /* b_cap */
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{3, {0x3E, 0x41, 0x22, 0x00}}, /* c_cap */
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{3, {0x7F, 0x41, 0x3E, 0x00}}, /* d_cap */
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{3, {0x7F, 0x49, 0x41, 0x00}}, /* e_cap */
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{3, {0x7F, 0x09, 0x01, 0x00}}, /* f_cap */
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{3, {0x3E, 0x41, 0x71, 0x00}}, /* g_cap */
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{3, {0x7F, 0x08, 0x7F, 0x00}}, /* h_cap */
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{3, {0x41, 0x7F, 0x41, 0x00}}, /* i_cap */
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{3, {0x40, 0x41, 0x3F, 0x00}}, /* j_cap */
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{3, {0x7F, 0x0C, 0x73, 0x00}}, /* k_cap */
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{3, {0x7F, 0x40, 0x40, 0x00}}, /* l_cap */
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{3, {0x7F, 0x06, 0x7F, 0x00}}, /* m_cap */
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{3, {0x7F, 0x3C, 0x7F, 0x00}}, /* n_cap */
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{3, {0x3E, 0x41, 0x3E, 0x00}}, /* o_cap */
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{3, {0x7F, 0x11, 0x0E, 0x00}}, /* p_cap */
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{3, {0x3E, 0x41, 0xBE, 0x00}}, /* q_cap */
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{3, {0x7F, 0x11, 0x6E, 0x00}}, /* r_cap */
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{3, {0x46, 0x49, 0x31, 0x00}}, /* s_cap */
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{3, {0x01, 0x7F, 0x01, 0x00}}, /* t_cap */
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{3, {0x3F, 0x40, 0x7F, 0x00}}, /* u_cap */
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{3, {0x3F, 0x40, 0x3F, 0x00}}, /* v_cap */
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{3, {0x7F, 0x30, 0x7F, 0x00}}, /* w_cap */
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{3, {0x73, 0x0C, 0x73, 0x00}}, /* x_cap */
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{3, {0x0F, 0x70, 0x0F, 0x00}}, /* y_cap */
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{3, {0x61, 0x5D, 0x47, 0x00}}, /* z_cap */
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{2, {0x7F, 0x41, 0x00, 0x00}}, /* lq_bracket */
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{3, {0x06, 0x18, 0x60, 0x00}}, /* rev_solidus */
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{2, {0x41, 0x7F, 0x00, 0x00}}, /* rq_bracket */
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{3, {0x02, 0x01, 0x02, 0x00}}, /* circumflex_accent */
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{3, {0x40, 0x40, 0x40, 0x00}}, /* low_line */
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{2, {0x01, 0x02, 0x00, 0x00}}, /* grave_accent */
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{3, {0x30, 0x48, 0x78, 0x00}}, /* a_sml */
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{3, {0x7E, 0x48, 0x30, 0x00}}, /* b_sml */
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{3, {0x30, 0x48, 0x48, 0x00}}, /* c_sml */
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{3, {0x30, 0x48, 0x7E, 0x00}}, /* d_sml */
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{3, {0x30, 0x58, 0x58, 0x00}}, /* e_sml */
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{2, {0x7C, 0x12, 0x00, 0x00}}, /* f_sml */
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{3, {0x10, 0xA8, 0x70, 0x00}}, /* g_sml */
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{3, {0x7E, 0x08, 0x70, 0x00}}, /* h_sml */
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{1, {0x74, 0x00, 0x00, 0x00}}, /* i_sml */
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{2, {0x80, 0x7A, 0x00, 0x00}}, /* j_sml */
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{3, {0x7E, 0x10, 0x68, 0x00}}, /* k_sml */
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{2, {0x3E, 0x40, 0x00, 0x00}}, /* l_sml */
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{3, {0x78, 0x38, 0x70, 0x00}}, /* m_sml */
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{3, {0x78, 0x08, 0x70, 0x00}}, /* n_sml */
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{3, {0x30, 0x48, 0x30, 0x00}}, /* o_sml */
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{3, {0xF8, 0x48, 0x30, 0x00}}, /* p_sml */
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{3, {0x30, 0x48, 0xF8, 0x00}}, /* q_sml */
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{2, {0x70, 0x08, 0x00, 0x00}}, /* r_sml */
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{3, {0x50, 0x58, 0x28, 0x00}}, /* s_sml */
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{2, {0x3E, 0x44, 0x00, 0x00}}, /* t_sml */
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{3, {0x38, 0x40, 0x78, 0x00}}, /* u_sml */
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{3, {0x38, 0x40, 0x38, 0x00}}, /* v_sml */
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{3, {0x78, 0x60, 0x78, 0x00}}, /* w_sml */
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{3, {0x68, 0x10, 0x68, 0x00}}, /* x_sml */
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{3, {0x18, 0xA0, 0x78, 0x00}}, /* y_sml */
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{3, {0x68, 0x68, 0x58, 0x00}}, /* z_sml */
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{3, {0x08, 0x36, 0x41, 0x00}}, /* left_curly_bracket */
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{1, {0x7F, 0x00, 0x00, 0x00}}, /* vertical_line */
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{3, {0x41, 0x36, 0x08, 0x00}}, /* rigth_curly_bracket */
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{4, {0x02, 0x01, 0x02, 0x01}}, /* tilde */
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{4, {0x00, 0x00, 0x00, 0x00}} /* del */
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};
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#define FONT_SYMBOLS_SPACE 1
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static void i2c_test(void) {
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static char* message = "Welcome to Teacup";
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static uint8_t block[128];
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uint8_t* pointer = block + 1;
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i2c_send(DISPLAY_I2C_ADDRESS, display_init, sizeof(display_init));
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delay_ms(250);
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/**
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Setup cursor on display.
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"Welcome to Teacup" is 64 pixel columns wide, entire display is
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128 columns, so we offset by 32 columns to get it to the center.
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*/
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block[0] = 0x00;
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// Line 1.
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block[1] = 0xB0 | 1;
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// Column 32.
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block[2] = 0x00 | (32 & 0x0F);
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block[3] = 0x10 | ((32 >> 4) & 0x0F);
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i2c_send(DISPLAY_I2C_ADDRESS, block, 4);
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delay_ms(50);
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// Render text to bitmap.
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while (*message) {
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SYMBOL symbol = font_8x4[(uint8_t)*message - 0x20];
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memcpy(pointer, symbol.data, symbol.columns);
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pointer += symbol.columns + FONT_SYMBOLS_SPACE;
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message++;
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}
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block[0] = 0x40; // Data marker.
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i2c_send(DISPLAY_I2C_ADDRESS, block, pointer - block);
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}
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#endif /* I2C_TEST */
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