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34 lines
994 B
Plaintext
34 lines
994 B
Plaintext
# See "System Structure and Address Mapping" figure at
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# https://www.espressif.com/sites/default/files/documentation/esp8684_technical_reference_manual_en.pdf
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ICACHE_SIZE = 0x4000;
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# Skip possible ICACHE area
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IRAM_START_ADDRESS = 0x4037C000 + ICACHE_SIZE;
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IRAM_LEN = 0x40000 - ICACHE_SIZE;
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DRAM_START_ADDRESS = 0x3FCA0000;
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DRAM_LEN = 0x40000;
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# Docs say that:
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# The default console baud rate on ESP32-C2:
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# - 115200 when a 40 MHz XTAL is used
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# - 74880 when a 26 MHz XTAL is used
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#
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# It seems something wrong with CPU_FREQUENCY and UART0_BAUD definitions,
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# but UART0_CLKDIV_VAL == 173 gives expected baud rate 74880 on 26 MHz XTAL.
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CPU_FREQUENCY = 20000000;
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UART0_BAUD = 115200;
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UART0_CLKDIV_REG = 0x60000014;
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UART0_CLKDIV_VAL = CPU_FREQUENCY / UART0_BAUD;
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UART0_STATUS = 0x6000001C;
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UART0_TX_ADDR = 0x60000000;
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MEMORY
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{
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iram_seg (RX) : org = IRAM_START_ADDRESS, len = IRAM_LEN
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dram_seg (RW) : org = DRAM_START_ADDRESS, len = DRAM_LEN
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}
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INCLUDE "targets/esp32-riscv.app.elf.ld";
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