From 0d8388673e8456f6b0e92e6f5941e0e804513204 Mon Sep 17 00:00:00 2001 From: Paul Grayson Date: Wed, 11 Oct 2023 04:39:15 -0700 Subject: [PATCH] docs/esp32: Update pin access example with addresses for ESP32-S3. Signed-off-by: Paul Grayson Signed-off-by: Angus Gratton --- docs/esp32/tutorial/peripheral_access.rst | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/docs/esp32/tutorial/peripheral_access.rst b/docs/esp32/tutorial/peripheral_access.rst index ecdec101f7..f7c32c367c 100644 --- a/docs/esp32/tutorial/peripheral_access.rst +++ b/docs/esp32/tutorial/peripheral_access.rst @@ -32,6 +32,18 @@ the prescaler of the MCPWM0 peripheral. mem32[MCPWM0] = 0x55 # change PWM_CLK_PRESCALE print(hex(mem32[MCPWM0])) # read PWM_CLK_CFG_REG +The specific addresses will be different on different ESP32 +models. For example, ESP32-S3 uses these values: + +.. code-block:: python3 + + DR_REG_DPORT_BASE = const(0x600C_0000) + DPORT_PERIP_CLK_EN0_REG = const(DR_REG_DPORT_BASE + 0x0018) + DPORT_PERIP_RST_EN0_REG = const(DR_REG_DPORT_BASE + 0x0020) + DPORT_PWM0_CLK_EN = const(1 << 17) + MCPWM0 = const(0x6001_E000 + 0x0004) + ... + Note that before a peripheral can be used its clock must be enabled and it must be taken out of reset. In the above example the following registers are used for this: