26 lines
575 B
C
26 lines
575 B
C
#include "ch32fun.h"
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#include "lwip/def.h"
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#include "systick.h"
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typedef uint32_t sys_prot_t;
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static unsigned long next = 1;
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int rand(void) {
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next = next * 1103515245 + 12345;
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return (unsigned int)(next / 65536) % 32768;
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}
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void srand(unsigned int seed) { next = seed; }
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uint32_t sys_now(void) { return millis(); }
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sys_prot_t sys_arch_protect(void) {
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unsigned int old_mstatus;
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__asm__ volatile("csrrci %0, mstatus, 8" : "=r"(old_mstatus));
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return old_mstatus;
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}
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void sys_arch_unprotect(sys_prot_t pval) {
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__asm__ volatile("csrw mstatus, %0" : : "r"(pval));
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}
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