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cmsisDAP: send disconnect after use

This commit is contained in:
Gwenhael Goavec-Merou 2021-10-12 07:52:38 +02:00
parent dd4e3e40df
commit 6a4d24cf7a
2 changed files with 38 additions and 1 deletions
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31
src/cmsisDAP.cpp
View File

@ -32,6 +32,7 @@ enum datalink_cmd {
DAP_HOSTSTATUS = 0x01,
DAP_CONNECT = 0x02, // Connect to device and select mode
DAP_DISCONNECT = 0x03, // Disconnect to device
DAP_RESETTARGET = 0x0A, // reset the target
DAP_SWJ_CLK = 0x11, // Select maximum frequency
DAP_SWJ_SEQUENCE = 0x12, // Generate TMS sequence
DAP_JTAG_SEQUENCE = 0x14 // Generate TMS, TDI and capture TDO Sequence
@ -89,7 +90,7 @@ enum cmsisdap_status {
CmsisDAP::CmsisDAP(int vid, int pid, bool verbose):_verbose(verbose),
_device_idx(0), _vid(vid), _pid(pid),
_serial_number(L""), _dev(NULL), _num_tms(0)
_serial_number(L""), _dev(NULL), _num_tms(0), _is_connect(false)
{
std::vector<struct hid_device_info *> dev_found;
_ll_buffer = (unsigned char *)malloc(sizeof(unsigned char) * 65);
@ -200,6 +201,8 @@ CmsisDAP::~CmsisDAP()
/* TODO: disconnect device
* close device
*/
if (_is_connect)
dapDisconnect();
if (_ll_buffer)
free(_ll_buffer);
}
@ -209,6 +212,8 @@ CmsisDAP::~CmsisDAP()
*/
int CmsisDAP::dapConnect()
{
if (_is_connect)
return 1;
_ll_buffer[1] = DAP_CONNECT;
_ll_buffer[2] = DAP_CONNECT_JTAG;
uint8_t response[2];
@ -217,6 +222,30 @@ int CmsisDAP::dapConnect()
return ret;
if (response[0] != DAP_CONNECT || response[1] != DAP_CONNECT_JTAG)
return 0;
_is_connect = true;
return 1;
}
/* send disconnect instruction (0x03)
*/
int CmsisDAP::dapDisconnect()
{
if (!_is_connect)
return 1;
int ret = xfer(DAP_DISCONNECT, NULL, 0);
if (ret <= 0)
return ret;
_is_connect = false;
return 1;
}
/* send resetTarget instruction (0x0A)
*/
int CmsisDAP::dapResetTarget()
{
int ret = xfer(DAP_RESETTARGET, NULL, 0);
if (ret <= 0)
return ret;
return 1;
}

8
src/cmsisDAP.hpp
View File

@ -80,6 +80,13 @@ class CmsisDAP: public JtagInterface {
* \return 1 if success <= 0 otherwhise
*/
int dapConnect();
/*!
* \brief disconnect device
* \return 1 if success <= 0 otherwhise
*/
int dapDisconnect();
int dapResetTarget();
int read_info(uint8_t info, uint8_t *rd_info, int max_len);
int xfer(int tx_len, uint8_t *rx_buff, int rx_len);
int xfer(uint8_t instruction, int tx_len,
@ -100,6 +107,7 @@ class CmsisDAP: public JtagInterface {
unsigned char *_ll_buffer; /**< message buffer */
unsigned char *_buffer; /**< subset of _ll_buffer */
int _num_tms; /**< current tms length */
int _is_connect; /**< device status ((dis)connected) */
};
#endif // SRC_CMSISDAP_HPP_