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-1

$begingroup$

I am working in open source where , I have Zynq-7000 wit ARM processor http://www.ioe.nchu.edu.tw/Pic/CourseItem/4468_20_Zynq_Architecture.pdf

and CMV12000 image sensor (https://ams.com/documents/20143/36005/CMV12000_DS000603_1-00.pdf/f6797bfc-f20b-a0a4-bcea-92e8a02bb112)

I have to memory map this sensors data using mmap in C . I have code but not getting why mmap twice .

static uint32_t cmv_base = 0x60000000;
static uint32_t cmv_size = 0x00400000;

static uint32_t map_base = 0x18000000;
static uint32_t map_size = 0x08000000;

static uint32_t map_addr = 0x00000000;

static char *dev_mem = "/dev/mem";

uint32_t cmv_addr = 0x00000000;

int main ()
 PROT_WRITE, MAP_SHARED,
 fd, map_base);

 return 0;
 

If this is not the place to ask , From where can I get help ?
please refer any resource .

c memory-optimization

share|improve this question

asked 16 mins ago

kanchakancha

1

New contributor

kancha is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

add a comment | 

-1

$begingroup$

I am working in open source where , I have Zynq-7000 wit ARM processor http://www.ioe.nchu.edu.tw/Pic/CourseItem/4468_20_Zynq_Architecture.pdf

and CMV12000 image sensor (https://ams.com/documents/20143/36005/CMV12000_DS000603_1-00.pdf/f6797bfc-f20b-a0a4-bcea-92e8a02bb112)

I have to memory map this sensors data using mmap in C . I have code but not getting why mmap twice .

static uint32_t cmv_base = 0x60000000;
static uint32_t cmv_size = 0x00400000;

static uint32_t map_base = 0x18000000;
static uint32_t map_size = 0x08000000;

static uint32_t map_addr = 0x00000000;

static char *dev_mem = "/dev/mem";

uint32_t cmv_addr = 0x00000000;

int main ()
 PROT_WRITE, MAP_SHARED,
 fd, map_base);

 return 0;
 

If this is not the place to ask , From where can I get help ?
please refer any resource .

c memory-optimization

share|improve this question

asked 16 mins ago

kanchakancha

1

New contributor

kancha is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

add a comment | 

$begingroup$

I am working in open source where , I have Zynq-7000 wit ARM processor http://www.ioe.nchu.edu.tw/Pic/CourseItem/4468_20_Zynq_Architecture.pdf

and CMV12000 image sensor (https://ams.com/documents/20143/36005/CMV12000_DS000603_1-00.pdf/f6797bfc-f20b-a0a4-bcea-92e8a02bb112)

I have to memory map this sensors data using mmap in C . I have code but not getting why mmap twice .

static uint32_t cmv_base = 0x60000000;
static uint32_t cmv_size = 0x00400000;

static uint32_t map_base = 0x18000000;
static uint32_t map_size = 0x08000000;

static uint32_t map_addr = 0x00000000;

static char *dev_mem = "/dev/mem";

uint32_t cmv_addr = 0x00000000;

int main ()
 PROT_WRITE, MAP_SHARED,
 fd, map_base);

 return 0;
 

If this is not the place to ask , From where can I get help ?
please refer any resource .

c memory-optimization

share|improve this question

asked 16 mins ago

kanchakancha

1

New contributor

kancha is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

static uint32_t cmv_base = 0x60000000;
static uint32_t cmv_size = 0x00400000;

static uint32_t map_base = 0x18000000;
static uint32_t map_size = 0x08000000;

static uint32_t map_addr = 0x00000000;

static char *dev_mem = "/dev/mem";

uint32_t cmv_addr = 0x00000000;

int main ()
 PROT_WRITE, MAP_SHARED,
 fd, map_base);

 return 0;
 

share|improve this question

asked 16 mins ago

kanchakancha

1

New contributor

kancha is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

asked 16 mins ago

kanchakancha

1

New contributor

kancha is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 16 mins ago

kanchakancha

1

New contributor

kancha is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 16 mins ago

kanchakancha

1