Merge pull request #635 from quietboil/improved

ssd1306: Allow SPI3 support to be disabled

Author: UncleRus

extras/ssd1306/component.mk

@@ -7,11 +7,13 @@ INC_DIRS += $(ssd1306_ROOT)..
 SSD1306_I2C_SUPPORT ?= 1
 # SPI4 support is on by default
 SSD1306_SPI4_SUPPORT ?= 1
+# SPI3 support is on by default
+SSD1306_SPI3_SUPPORT ?= 1
 
 # args for passing into compile rule generation
 ssd1306_SRC_DIR = $(ssd1306_ROOT)
 
-ssd1306_CFLAGS = -DSSD1306_I2C_SUPPORT=${SSD1306_I2C_SUPPORT} -DSSD1306_SPI4_SUPPORT=${SSD1306_SPI4_SUPPORT} $(CFLAGS)
+ssd1306_CFLAGS = -DSSD1306_I2C_SUPPORT=${SSD1306_I2C_SUPPORT} -DSSD1306_SPI4_SUPPORT=${SSD1306_SPI4_SUPPORT} -DSSD1306_SPI3_SUPPORT=${SSD1306_SPI3_SUPPORT} $(CFLAGS)
 
 
 $(eval $(call component_compile_rules,ssd1306))

extras/ssd1306/ssd1306.c

@@ -236,7 +236,9 @@ static int sh1106_go_coordinate(const ssd1306_t *dev, uint8_t x, uint8_t y)
 int ssd1306_load_frame_buffer(const ssd1306_t *dev, uint8_t buf[])
 {
     uint16_t i;
+#if (SSD1306_SPI3_SUPPORT)
     uint8_t j;
+#endif
 #if (SSD1306_I2C_SUPPORT)
     uint8_t tab[16] = { 0 };
 #endif