47 lines
955 B
ArmAsm
47 lines
955 B
ArmAsm
/*
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* Infineon XMC1000 flash
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*
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* Copyright (c) 2016 Andreas Färber
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*
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* Based on XMC1100 AA-Step Reference Manual
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*
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* License: GPL-2.0+
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*/
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.text
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.syntax unified
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.cpu cortex-m0
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.thumb
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.thumb_func
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#define NVMSTATUS 0x00
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#define NVMPROG 0x04
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#define NVMCONF 0x08
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#define NVMSTATUS_BUSY (1 << 0)
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#define NVMSTATUS_VERR_NOFAIL (0x0 << 2)
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#define NVMSTATUS_VERR_MASK (0x3 << 2)
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#define NVMPROG_ACTION_IDLE 0x00
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#define NVMPROG_ACTION_WRITE_CONTINUOUS 0xA1
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#define NVMPROG_ACTION_PAGE_ERASE_CONTINUOUS 0xA2
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#define NVMPROG_ACTION_VERIFY_CONTINUOUS 0xE0
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#define NVMCONF_HRLEV_NR (0x0 << 1)
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#define NVMCONF_HRLEV_HRE (0x2 << 1)
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#define NVMCONF_HRLEV_MASK (0x3 << 1)
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#define NVM_WORD_SIZE 4
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#define NVM_BLOCK_SIZE (4 * NVM_WORD_SIZE)
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#define NVM_PAGE_SIZE (16 * NVM_BLOCK_SIZE)
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.macro busy_wait, nvmbase, tmp, tmp2
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1:
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ldrh \tmp, [\nvmbase, #NVMSTATUS]
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movs \tmp2, #NVMSTATUS_BUSY
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ands \tmp, \tmp, \tmp2
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cmp \tmp, \tmp2
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beq 1b
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.endm
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