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esp32s2: cam.c: work around possible compiler bug

This commit is contained in:
Jeff Epler 2021-06-10 10:42:36 -05:00
parent 8c88ab8142
commit 929d6dab73
1 changed files with 7 additions and 2 deletions
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9
ports/esp32s2/cam.c
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@ -106,13 +106,18 @@ static void cam_config(const cam_config_t *config) {
periph_module_enable(PERIPH_I2S0_MODULE); periph_module_enable(PERIPH_I2S0_MODULE);
/*!< Configure the clock */ /*!< Configure the clock */
#if 0
I2S0.clkm_conf.val = 0; I2S0.clkm_conf.val = 0;
I2S0.clkm_conf.clkm_div_num = 2; I2S0.clkm_conf.clkm_div_num = 2; // <--- this should set the low 8 bits, but doesn't somehow
I2S0.clkm_conf.clkm_div_b = 0; I2S0.clkm_conf.clkm_div_b = 0;
I2S0.clkm_conf.clkm_div_a = 0; I2S0.clkm_conf.clkm_div_a = 0;
I2S0.clkm_conf.clk_sel = 2; I2S0.clkm_conf.clk_sel = 2;
I2S0.clkm_conf.clk_en = 1; I2S0.clkm_conf.clk_en = 1;
#else
// The above code should set the clock to this value .. however, it sets it to 0x0050_0000 instead, the "clkm_div_num" value missing!
// it's not clear why this behavior arises
I2S0.clkm_conf.val = 0x00500002;
#endif
/*!< Configuration sampling rate */ /*!< Configuration sampling rate */
I2S0.sample_rate_conf.val = 0; I2S0.sample_rate_conf.val = 0;
I2S0.sample_rate_conf.tx_bck_div_num = 2; I2S0.sample_rate_conf.tx_bck_div_num = 2;